ci: Update actions and pin to commit

In preparation for GitHub dropping Node 24

Author: bbhtt

.github/workflows/check.yml

@@ -23,7 +23,8 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
     - name: Check out flatpak
-      uses: actions/checkout@v4
+      # 6.0.2
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
       with:
         submodules: true
     - name: Install Dependencies
@@ -51,7 +52,8 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
     - name: Check out flatpak
-      uses: actions/checkout@v4
+      # 6.0.2
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
       with:
         submodules: true
     - name: Install Dependencies
@@ -84,7 +86,8 @@ jobs:
 
     steps:
     - name: Check out flatpak-builder
-      uses: actions/checkout@v4
+      # 6.0.2
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
 
     - name: Install Dependencies
       run: |
@@ -99,7 +102,8 @@ jobs:
       run: meson compile -C ${BUILDDIR}
 
     - name: Upload docs
-      uses: actions/upload-artifact@v4
+      # 7.0.0
+      uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f
       with:
         if-no-files-found: error
         overwrite: true
@@ -111,7 +115,8 @@ jobs:
       run: timeout --signal=KILL -v ${TESTS_TIMEOUT}m meson test -C ${BUILDDIR} --verbose
 
     - name: Upload test logs
-      uses: actions/upload-artifact@v4
+      # 7.0.0
+      uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f
       if: failure() || cancelled()
       with:
         name: test logs