[TASK] Bump our GitHub Actions to Node 24-compatible versions

actions/checkout@v4 -> v6, actions/cache@v4 -> v5,
actions/upload-artifact@v4 -> v7. The remaining
actions/cache/restore@v4 warning is transitive inside
awalsh128/cache-apt-pkgs-action@v1 (upstream PRs #193, #198) and
can't be fixed from here.

Author: wazum

.github/workflows/e2e.yml

@@ -22,7 +22,7 @@ jobs:
         exclude:
           - { php: '8.4', typo3: '^12.4' }
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       # libheif-plugin-aomenc gives libheif a real AV1 encoder; without it
       # heifsave fails with "Unsupported compression" on Ubuntu 24.04.
@@ -50,7 +50,7 @@ jobs:
       # Composer download cache — independent of TYPO3 version pin.
       - name: Cache Composer downloads
         if: ${{ !env.ACT }}
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.composer/cache
           key: e2e-composer-${{ matrix.php }}-${{ matrix.typo3 }}-${{ hashFiles('composer.json') }}
@@ -65,7 +65,7 @@ jobs:
       - name: Cache built TYPO3 instance
         id: instance-cache
         if: ${{ !env.ACT }}
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: /tmp/plan2net-webp-e2e/instance
           key: e2e-instance-${{ matrix.php }}-${{ matrix.typo3 }}-${{ hashFiles('composer.json', 'Classes/**', 'Configuration/**', 'ext_*.php', 'ext_tables.sql', 'Resources/Private/Language/**', 'Tests/E2E/bootstrap.sh', 'Tests/E2E/fixtures/**') }}
@@ -87,7 +87,7 @@ jobs:
 
       - name: Upload logs on failure
         if: failure()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: e2e-logs-php${{ matrix.php }}-typo3-${{ strategy.job-index }}
           path: |

.github/workflows/publish.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Get release info
         env:

.github/workflows/tests.yml

@@ -20,7 +20,7 @@ jobs:
         exclude:
           - { php: '8.4', typo3: '^12.4' }
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       # libheif1 + plugins give ImageMagick and libvips a real AV1 encoder so
       # AVIF write paths exercise instead of skipping. libheif-plugin-aomenc is
@@ -58,7 +58,7 @@ jobs:
 
       - name: Cache Composer downloads
         if: ${{ !env.ACT }}
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.composer/cache
           key: composer-${{ matrix.php }}-${{ matrix.typo3 }}-${{ hashFiles('composer.json') }}
@@ -91,7 +91,7 @@ jobs:
     name: composer validate
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: shivammathur/setup-php@v2
         with:
           php-version: '8.3'
@@ -103,7 +103,7 @@ jobs:
     name: php-cs-fixer
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: shivammathur/setup-php@v2
         with:
           php-version: '8.3'
@@ -119,7 +119,7 @@ jobs:
     name: phpstan
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: shivammathur/setup-php@v2
         with:
           php-version: '8.3'