fixup! workflow: Fix gem install

Author: chfoo

.github/workflows/patch-apk.yml

@@ -18,6 +18,8 @@ jobs:
         run: rustup target add x86_64-unknown-linux-musl
       - name: Cache Rust
         uses: Swatinem/rust-cache@v2
+      - name: Set up path
+        run: ruby -e 'puts Gem.user_dir + "/bin"' >> "$GITHUB_PATH"
       - name: Install fpm
         run: gem install --user-install fpm
       - name: Running build script