Fix Forgejo compatibility: use ubuntu-latest and actions@v3

.forgejo/workflows/build-packages.yml

@@ -15,10 +15,10 @@ env:
 jobs:
   build-libostree-backport:
     name: Build libostree Backport
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
 
       - name: Setup build environment
         run: |
@@ -64,7 +64,7 @@ jobs:
           dpkg-buildpackage -us -uc -b
 
       - name: Upload libostree artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v3
         with:
           name: libostree-backport-packages
           path: /opt/Projects/ostree-backport-noble/*.deb
@@ -72,14 +72,14 @@ jobs:
 
   build-bootc:
     name: Build bootc Package
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
     needs: build-libostree-backport
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
 
       - name: Download libostree artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v3
         with:
           name: libostree-backport-packages
           path: /tmp/libostree-packages
@@ -115,7 +115,7 @@ jobs:
           dpkg-buildpackage -us -uc -b
 
       - name: Upload bootc artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v3
         with:
           name: bootc-packages
           path: bootc-${BOOTC_VERSION}/../*.deb
@@ -123,11 +123,11 @@ jobs:
 
   create-artifacts:
     name: Create Combined Artifacts
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
     needs: [build-libostree-backport, build-bootc]
     steps:
       - name: Download all artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v3
         with:
           path: /tmp/artifacts
 
@@ -138,7 +138,7 @@ jobs:
           cp /tmp/artifacts/bootc-packages/*.deb release-assets/ 2>/dev/null || true
 
       - name: Upload combined artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v3
         with:
           name: release-assets
           path: release-assets/

.forgejo/workflows/test-build.yml

@@ -12,10 +12,10 @@ env:
 jobs:
   test-bootc-build:
     name: Test bootc Build (with existing libostree)
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
 
       - name: Setup build environment
         run: |

.forgejo/workflows/update-readme.yml

@@ -9,16 +9,16 @@ on:
 jobs:
   update-readme:
     name: Update README with Artifact Links
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
     if: ${{ github.event.workflow_run.conclusion == 'success' }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Download artifacts from previous workflow
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v3
         with:
           name: release-assets
           path: /tmp/artifacts