fix: rework github release action

Author: zeidlitz

.github/workflows/release.yaml

@@ -27,14 +27,14 @@ jobs:
 
       - name: Package artifacts
         run: |
-          TAG=${{GITHUB_REF_NAME}}
+          TAG=${{ github.ref_name }}
           tar -czf observer-${{ matrix.goarch }}-$TAG.tar.gz observer-${{ matrix.goarch }}
 
       - name: Upload artifacts
         uses: actions/upload-artifact@v4
         with:
           name: observer-${{ matrix.goarch }}
-          path: observer-${{ matrix.goarch }}-${{GITHUB_REF_NAME}}.tar.gz
+          path: observer-${{ matrix.goarch }}-${{ github.ref_name }}.tar.gz
   release:
     runs-on: ubuntu-latest
     needs: build
@@ -48,5 +48,5 @@ jobs:
       - name: Release
         uses: softprops/action-gh-release@v2
         with:
-          name: observer-${{GITHUB_REF_NAME}}
+          name: observer-${{ github.ref_name }}
           files: ./artifacts/**/*.tar.gz