Attempt to use minimum viable versions of actions in GitHub Actions.

The container does not support newer libc6 versions that node actions are linked to.

.github/workflows/release.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     container: ghcr.io/orbitalquark/textadept-build:v1.0
     outputs:
       version: ${{ steps.build.outputs.version }}
@@ -50,7 +50,7 @@ jobs:
           fi
           echo "::set-output name=version::$version"
       - name: Upload artifacts
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: artifacts
           path: |
@@ -61,7 +61,7 @@ jobs:
     needs: build
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Tag
         run: |
           git tag scintillua_${{ needs.build.outputs.version }}
@@ -71,7 +71,7 @@ jobs:
     needs: [build, tag]
     steps:
       - name: Download artifacts
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4
         with:
           name: artifacts
       - name: Create release log