Update clone.yml

Signed-off-by: Sidney Andrews <[email protected]>

.github/workflows/clone.yml

@@ -47,7 +47,9 @@ jobs:
         run: git checkout -b $WORKING_BRANCH
       - name: Clear existing project
         working-directory: target
-        run: find . -mindepth 1 ! -regex '\./\(\.devcontainer\|\.github\|LICENSE\|readme\.md\)' -print0 | xargs -0 rm -rf
+        run: |
+          shopt -s extglob
+          rm -rf !(".devcontainer"|".github"|"LICENSE"|"readme.md")
       - name: Copy source to target
         run: cp -ra source/src/. target/
       - name: Change text content