ci: mount runner .ssh into container

.forgejo/workflows/release.yml

@@ -8,20 +8,16 @@ on:
 jobs:
   release:
     runs-on: ubuntu-latest
+    container:
+      image: golang:1.27
+      volumes:
+        - /root/.ssh:/root/.ssh:ro
 
     steps:
-      - name: Install Go and packaging tools
+      - name: Install packaging tools
         run: |
           apt-get update
           apt-get install -y dpkg-dev git curl openssh-client
-          # Install Go if not present (works on Debian/Ubuntu runners)
-          if ! command -v go &> /dev/null; then
-            GO_VERSION=1.27.1
-            curl -sL "https://go.dev/dl/go${GO_VERSION}.linux-amd64.tar.gz" | tar -C /usr/local -xz
-            export PATH="/usr/local/go/bin:${PATH}"
-            echo "PATH=${PATH}" >> "$GITHUB_ENV"
-          fi
-          go version
 
       - name: Setup SSH
         run: |