Fix CI: remove golang container, install Go in-step

The golang:1.23 container image lacks Node.js, causing
actions/checkout@v4 to fail. Use the default runner image
(which has Node) and install Go manually.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitea/workflows/release.yml

@@ -8,8 +8,6 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    container:
-      image: golang:1.23
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -17,6 +15,13 @@ jobs:
       - name: Extract version
         run: echo "VERSION=${GITHUB_REF_NAME#v}" >> $GITHUB_ENV
 
+      - name: Install Go
+        run: |
+          curl -sSL https://go.dev/dl/go1.23.6.linux-amd64.tar.gz -o /tmp/go.tar.gz
+          tar -C /usr/local -xzf /tmp/go.tar.gz
+          echo "/usr/local/go/bin" >> $GITHUB_PATH
+          echo "$(go env GOPATH)/bin" >> $GITHUB_PATH
+
       - name: Install nfpm
         run: go install github.com/goreleaser/nfpm/v2/cmd/nfpm@latest