Update release workflow Flutter version to allow publishing

Author: stuartmorgan-g

.github/workflows/release.yml

@@ -31,7 +31,7 @@ jobs:
       # the change if it doesn't.
       run: |
         cd $HOME
-        git clone https://github.com/flutter/flutter.git --depth 1 -b 3.38.1 _flutter
+        git clone https://github.com/flutter/flutter.git --depth 1 -b 3.38.5 _flutter
         echo "$HOME/_flutter/bin" >> $GITHUB_PATH
         cd $GITHUB_WORKSPACE
     # Checks out a copy of the repo.