build(deps): bump actions/checkout from 3 to 4 (#3980)

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/build-ci.yaml

@@ -15,7 +15,7 @@ jobs:
 
     steps:
     - name: Pull Yaru
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Check sources structure
       run: |

.github/workflows/build-deb.yaml

@@ -22,7 +22,7 @@ jobs:
 
     steps:
     - name: Checkout Yaru code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Prepare container
       run: |

.github/workflows/open-pr-on-changes.yaml

@@ -83,7 +83,7 @@ jobs:
       ]
     steps:
       # Checkout code
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Download from ${{ matrix.buildenv.repo }}, on branch ${{ matrix.buildenv.upstreambranch }}
         id: checknewupstream
         run: |

.github/workflows/open-pr-on-icons-changes.yaml

@@ -174,7 +174,7 @@ jobs:
       ]
     steps:
       # Checkout code
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Download from ${{ matrix.buildenv.repo }}, on branch ${{ matrix.buildenv.upstreambranch }}
         id: checknewupstream
         run: |

.github/workflows/open-pr-on-optimized-symbolic-icons-changes.yaml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Yaru code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup common variables
         id: env

.github/workflows/open-pr-on-rendered-icons-changed.yaml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Yaru code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           persist-credentials: true

.github/workflows/track-lp-issues.yaml

@@ -13,7 +13,7 @@ jobs:
 
     steps:
       # Checkout code
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Python 3
         uses: actions/setup-python@v4.7.0
       - name: Install dependencies