💚 Fix artifacts release (#671)

## What does this change?

https://github.com/FlutterGen/flutter_gen/actions/runs/13612602409/job/38051634384

Related to actions/upload-artifact#480

Also allows manual dispatch.

## Type of change

- [x] Bug fix (non-breaking change which fixes an issue)

Author: AlexV525

.github/workflows/release.yml

@@ -67,37 +67,18 @@ jobs:
 
       - uses: actions/upload-artifact@v4
         with:
-          name: sha256
+          name: sha256-${{ strategy.job-index }}
           path: packages/command/bin/${{ matrix.target }}/fluttergen-${{ matrix.artifact_prefix }}.sha256
 
-      # - name: Setup credentials
-      #   if: startsWith(matrix.os, 'ubuntu')
-      #   run: |
-      #     mkdir -p ~/.pub-cache
-      #     cat <<eof > ~/.pub-cache/credentials.json
-      #     {
-      #       "accesstoken":"${{ secrets.CREDENTIALS_ACCESS_TOKEN }}",
-      #       "refreshtoken":"${{ secrets.CREDENTIALS_REFRESH_TOKEN }}",
-      #       "idtoken":"${{ secrets.CREDENTIALS_ID_TOKEN }}",
-      #       "tokenendpoint":"https://accounts.google.com/o/oauth2/token",
-      #       "scopes": [ "openid", "https://www.googleapis.com/auth/userinfo.email" ],
-      #       "expiration": 1664440281637
-      #     }
-      #     eof
-      #
-      # - name: Publish to pub.dev
-      #   if: startsWith(matrix.os, 'ubuntu')
-      #   run: |
-      #     melos publish --no-dry-run --yes
-
   update:
     name: Update Homebrew tap
     runs-on: ubuntu-latest
     needs: build
     steps:
       - uses: actions/[email protected]
         with:
-          name: sha256
+          pattern: sha256-*
+          merge-multiple: true
 
       # GitHub Apps
       - name: Generate github apps token