Fix another bare use of 'pub' (#403)

Follow-up to #401 that fixes a missed instance.
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 539b232..c263707 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -41,7 +41,7 @@
       run: |
         git config --global user.name ${{ secrets.USER_NAME }}
         git config --global user.email ${{ secrets.USER_EMAIL }}
-        pub global run flutter_plugin_tools publish-plugin --all-changed --base-sha=HEAD~ --skip-confirmation --remote=origin
+        dart pub global run flutter_plugin_tools publish-plugin --all-changed --base-sha=HEAD~ --skip-confirmation --remote=origin
       env: {PUB_CREDENTIALS: "${{ secrets.PUB_CREDENTIALS }}"}
 
     env: