chore: shell bash

Author: iowillhoit

.github/workflows/externalNut.yml

@@ -126,6 +126,7 @@ jobs:
 
       - name: Swap this dependency for the version on this branch
         if: ${{ steps.cache-nodemodules.outputs.cache-hit != 'true' }}
+        shell: bash
         run: |
           yarn remove "$INPUTS_PACKAGE_NAME"
           yarn add ${{ github.repository }}#${{ github.sha }}