Bump actions/checkout from 2.3.1 to 2.4.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.3.1 to 2.4.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2.3.1...v2.4.0)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/docs.yml

@@ -13,7 +13,7 @@ jobs:
       image: tendermintdev/docker-website-deployment
     steps:
       - name: Checkout 🛎️
-        uses: actions/checkout@v2.3.1
+        uses: actions/checkout@v2.4.0
         with:
           persist-credentials: false
           fetch-depth: 0

.github/workflows/linkchecker.yml

@@ -6,7 +6,7 @@ jobs:
   markdown-link-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@v2.4.0
       - uses: gaurav-nelson/github-action-markdown-link-check@1.0.13
         with:
           folder-path: "docs"

.github/workflows/lint.yml

@@ -12,7 +12,7 @@ jobs:
     name: golangci-lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.4.0
       - uses: technote-space/get-diff-action@v5.0.2
         with:
           PATTERNS: |

.github/workflows/release-sims.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     if: "!contains(github.event.head_commit.message, 'skip-sims')"
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.4.0
       - run: |
           make build
 
@@ -50,7 +50,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [build, install-runsim]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.4.0
       - uses: actions/cache@v1
         with:
           path: ~/go/bin
@@ -63,7 +63,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: newbuild
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.4.0
       - uses: actions/setup-go@v2.1.5
         with:
           go-version: 1.16

.github/workflows/sim-label.yml

@@ -30,7 +30,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: newbuild
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.4.0
       - uses: actions/setup-go@v2.1.5
         with:
           go-version: 1.16

.github/workflows/sims.yml

@@ -30,7 +30,7 @@ jobs:
 #    runs-on: ubuntu-latest
 #    needs: Build
 #    steps:
-#      - uses: actions/checkout@v2
+#      - uses: actions/checkout@v2.4.0
 #      - uses: actions/setup-go@v2.1.5
 #        with:
 #          go-version: 1.16
@@ -60,7 +60,7 @@ jobs:
             **/**.go
             go.mod
             go.sum
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.4.0
       - uses: actions/setup-go@v2.1.5
         with:
           go-version: 1.16
@@ -81,7 +81,7 @@ jobs:
       - uses: actions/setup-go@v2.1.5
         with:
           go-version: 1.16
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.4.0
       - uses: technote-space/get-diff-action@v5.0.2
         with:
           PATTERNS: |
@@ -102,7 +102,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: Build
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.4.0
       - uses: actions/setup-go@v2.1.5
         with:
           go-version: 1.16
@@ -127,7 +127,7 @@ jobs:
     needs: Build
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.4.0
       - uses: actions/setup-go@v2.1.5
         with:
           go-version: 1.16

.github/workflows/test.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/setup-go@v2.1.5
         with:
           go-version: 1.16
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.4.0
       - uses: technote-space/get-diff-action@v5.0.2
         with:
           PATTERNS: |