A few workflow fixes for working with Dependabot

Author: jeremypoulter

.github/workflows/build_gui.yml

@@ -24,6 +24,8 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: recursive
+          ref: ${{ github.head_ref }}
+          token: ${{ secrets.DEPENDABOT_PAT }}
 
       - name: Cache pip
         uses: actions/cache@v4