this might work

.forgejo/workflows/build.yml

@@ -21,16 +21,13 @@ jobs:
     - name: npm run build
       run: npm run build
     - name: Write desc
-      run: NOTES=$(git tag -n99 --format="%(contents)")
+      id: desc
+      run: cat "NOTES=" >> "FORGEJO_OUTPUT"; git tag -n99 --format="%(contents)" >> "FORGEJO_OUTPUT";
     - name: tar it
       run: mkdir release; tar -czvf release.tar.gz dist
     - uses: actions/forgejo-release@v2.13.4
       with:
         direction: upload
-        url: https://codeberg.org/
-        repo: MelodyChat/fermi
-        token: ${{ secrets.CODEBERG_TOKEN }}
-        tag: ${{ github.ref_name }}
         release-dir: release/
-        release-notes: ${{ env.NOTES }}
+        release-notes: ${{ steps.desc.outputs.NOTES }}