CI: revert to act image, pin nfpm version to avoid Go toolchain switch

The golang:1.24 container lacks Node (needed by actions/checkout).
Pin nfpm to v2.41.1 to avoid go>=1.25 requirement that triggers
toolchain download and breaks the build.

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

.gitea/workflows/release.yml

@@ -8,7 +8,6 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    container: golang:1.24-bookworm
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -16,8 +15,17 @@ jobs:
       - name: Extract version
         run: echo "VERSION=${GITHUB_REF_NAME#v}" >> $GITHUB_ENV
 
+      - name: Install Go
+        run: |
+          curl -sSL https://go.dev/dl/go1.24.1.linux-amd64.tar.gz -o /tmp/go.tar.gz
+          tar -C /usr/local -xzf /tmp/go.tar.gz
+          echo "/usr/local/go/bin" >> $GITHUB_PATH
+
       - name: Install nfpm
-        run: go install github.com/goreleaser/nfpm/v2/cmd/nfpm@latest
+        run: |
+          export GOPATH=$HOME/go
+          go install github.com/goreleaser/nfpm/v2/cmd/nfpm@v2.41.1
+          echo "$GOPATH/bin" >> $GITHUB_PATH
 
       - name: Build Linux binaries
         run: |