Bump actions/checkout from 3 to 4 (#73)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/deny.yml

@@ -20,7 +20,7 @@ jobs:
         with:
           access_token: ${{ github.token }}
       - name:           Checkout sources & submodules
-        uses:           actions/checkout@v3
+        uses:           actions/checkout@v4
         with:
           fetch-depth:  5
           submodules:   recursive

.github/workflows/lint.yml

@@ -22,7 +22,7 @@ jobs:
         with:
           access_token: ${{ github.token }}
       - name:           Checkout sources & submodules
-        uses:           actions/checkout@v3
+        uses:           actions/checkout@v4
         with:
           fetch-depth:  5
           submodules:   recursive

.github/workflows/rust.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install Rust nightly toolchain
         uses: actions-rs/toolchain@v1
@@ -43,7 +43,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install Rust stable toolchain
         uses: actions-rs/toolchain@v1
@@ -69,7 +69,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install Rust stable toolchain
         uses: actions-rs/toolchain@v1
@@ -92,7 +92,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install Rust stable toolchain
         uses: actions-rs/toolchain@v1
@@ -116,7 +116,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install Rust stable toolchain
         uses: actions-rs/toolchain@v1
@@ -147,7 +147,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install Rust stable toolchain
         uses: actions-rs/toolchain@v1