ci: update github workflows dependencies

Mainly to get a newer Go version, but upgrade everything else too
while we are at it...

.github/workflows/go.yml

@@ -1,5 +1,7 @@
 on:
   push:
+    branches:
+      - cbo/update-github-workflow # TODO remove me
     # Sequence of patterns matched against refs/tags
     tags:
       - 'v*' # Push events to matching v*, i.e. v1.0, v20.15.10
@@ -12,17 +14,17 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Setup GO
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v4
         with:
-          go-version: 1.18
+          go-version: 1.21
       - name: Build project
         run: |
           make release
       - name: Extract Release Notes
         id: extract_release_notes
-        uses: ffurrer2/extract-release-notes@v1.16.0
+        uses: ffurrer2/extract-release-notes@v1.17.0
       - name: Create Release
         id: create_release
         uses: actions/create-release@v1