ci: 💚 fix API.md upload gh command (#96)

Attaching API docs was failing beucase the wron template variable
was used.

.github/workflows/api-docs-release.yml

@@ -43,6 +43,6 @@ jobs:
 
       - name: Attach Docs to Release
         run:
-          gh release upload ${{ github.event.inputs.tag }} --clobber dist/API.md
+          gh release upload ${{ inputs.tag }} --clobber dist/API.md
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}