Fix workflow: use setup-go@v4 for Gitea Actions compatibility

.gitea/workflows/release.yml

@@ -0,0 +1,77 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  build:
+    runs-on: linux-latest
+    strategy:
+      matrix:
+        include:
+          - goos: linux
+            goarch: amd64
+          - goos: linux
+            goarch: arm64
+          - goos: darwin
+            goarch: amd64
+          - goos: darwin
+            goarch: arm64
+          - goos: windows
+            goarch: amd64
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v4
+        with:
+          go-version: '1.21'
+          cache: false
+
+      - name: Build
+        shell: bash
+        run: |
+          VERSION="${GITHUB_REF_NAME#v}"
+          EXT=""
+          if [ "${{ matrix.goos }}" = "windows" ]; then
+            EXT=".exe"
+          fi
+          echo "Building for ${{ matrix.goos }}/${{ matrix.goarch }} version ${VERSION}"
+          CGO_ENABLED=0 GOOS=${{ matrix.goos }} GOARCH=${{ matrix.goarch }} \
+            go build -ldflags "-s -w -X main.version=${VERSION}" \
+            -o "gitea-mcp-server-${{ matrix.goos }}-${{ matrix.goarch }}${EXT}"
+          ls -la gitea-mcp-server-*
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: gitea-mcp-server-${{ matrix.goos }}-${{ matrix.goarch }}
+          path: gitea-mcp-server-*
+
+  release:
+    needs: build
+    runs-on: linux-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Download all artifacts
+        uses: actions/download-artifact@v3
+        with:
+          path: artifacts
+
+      - name: Prepare release files
+        shell: bash
+        run: |
+          mkdir -p release
+          find artifacts -type f -name 'gitea-mcp-server-*' -exec mv {} release/ \;
+          cd release && sha256sum * > checksums.txt
+          ls -la
+
+      - name: Create Release
+        uses: softprops/action-gh-release@v1
+        with:
+          files: release/*
+          generate_release_notes: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}