Move the workflow actions off Node 20

checkout and action-gh-release both still target Node 20, which GitHub
has deprecated and is already force-running on Node 24. Nothing is broken
yet, but the runners won't accommodate it indefinitely, and a release
workflow is a poor place to discover that.

.github/workflows/release.yml

@@ -28,7 +28,7 @@ jobs:
       # below treats as "fall back to ad-hoc".
       SIGNING_IDENTITY: ${{ secrets.SIGNING_IDENTITY }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
           ref: ${{ inputs.tag || github.ref }}
 
@@ -139,7 +139,7 @@ jobs:
         run: ditto -c -k --sequesterRsrc --keepParent ".build/shannoncoat.app" "shannoncoat.app.zip"
 
       - name: Publish release
-        uses: softprops/action-gh-release@v2
+        uses: softprops/action-gh-release@v3
         with:
           tag_name: ${{ inputs.tag || github.ref_name }}
           files: |

.github/workflows/tag-on-version-bump.yml

@@ -15,7 +15,7 @@ jobs:
       tag: ${{ steps.tag.outputs.tag }}
       created: ${{ steps.tag.outputs.created }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0