Bump actions/download-artifact from 2 to 4.1.7 in /.github/workflows

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 2 to 4.1.7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v2...v4.1.7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/backtest.yml

@@ -60,7 +60,7 @@ jobs:
         month: [1]
         year: [2019, 2020]
     steps:
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         with:
           name: EA
       - name: Run strategy

.github/workflows/optimize-indi.yml

@@ -83,7 +83,7 @@ jobs:
         tf: [M1, M5, M15, M30]
       max-parallel: 4
     steps:
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         with:
           path: .
       - name: Generate env file
@@ -173,11 +173,11 @@ jobs:
           persist-credentials: false
           # Otherwise, you will failed to push refs to dest repo.
           fetch-depth: 0
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         with:
           name: config
           path: config
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         with:
           name: results
           path: .results

.github/workflows/optimize-pricestop.yml

@@ -83,7 +83,7 @@ jobs:
         tf: [M1, M5, M15, M30]
       max-parallel: 4
     steps:
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         with:
           path: .
       - name: Generate env file
@@ -173,11 +173,11 @@ jobs:
           persist-credentials: false
           # Otherwise, you will failed to push refs to dest repo.
           fetch-depth: 0
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         with:
           name: config
           path: config
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         with:
           name: results
           path: .results

.github/workflows/optimize-signalclose.yml

@@ -83,7 +83,7 @@ jobs:
         tf: [M1, M5, M15, M30]
       max-parallel: 4
     steps:
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         with:
           path: .
       - name: Generate env file
@@ -173,11 +173,11 @@ jobs:
           persist-credentials: false
           # Otherwise, you will failed to push refs to dest repo.
           fetch-depth: 0
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         with:
           name: config
           path: config
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         with:
           name: results
           path: .results

.github/workflows/optimize-signalopen.yml

@@ -83,7 +83,7 @@ jobs:
         tf: [M1, M5, M15, M30]
       max-parallel: 4
     steps:
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         with:
           path: .
       - name: Generate env file
@@ -173,11 +173,11 @@ jobs:
           persist-credentials: false
           # Otherwise, you will failed to push refs to dest repo.
           fetch-depth: 0
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         with:
           name: config
           path: config
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         with:
           name: results
           path: .results

.github/workflows/optimize-tick.yml

@@ -83,7 +83,7 @@ jobs:
         tf: [M1, M5, M15, M30]
       max-parallel: 4
     steps:
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         with:
           path: .
       - name: Generate env file
@@ -173,11 +173,11 @@ jobs:
           persist-credentials: false
           # Otherwise, you will failed to push refs to dest repo.
           fetch-depth: 0
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         with:
           name: config
           path: config
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         with:
           name: results
           path: .results