corrected if statement

Author: Guy Davenport

.github/workflows/generate-schema.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Check Branch with Regex
         id: check-tag
         run: |
-          if [[ "${{ github.ref }}" =~ ^refs/heads/brapi-V[0-9]+\.[0-9]+$ ]]; then
+          if [ "${{ github.ref }}" =~ ^refs/heads/brapi-V[0-9]+\.[0-9]+$ ]; then
             echo "commit=true" >> $GITHUB_ENV
           else
             echo "commit=false" >> $GITHUB_ENV