Update wiki_automation.yml

Author: Gyulguma

.github/workflows/wiki_automation.yml

@@ -20,7 +20,7 @@ jobs:
       - name: Get newly added README.md files
         id: get_files
         run: |
-          FILES=$(git diff --name-only --diff-filter=A HEAD~1 HEAD | grep -E "^(백준|프로그래머스)/.*/README.md$")
+          FILES=$(git diff --name-only --diff-filter=A HEAD~1 HEAD | grep -E "^(백준|프로그래머스)/.*/.*/README.md$")
           echo "Found new files: $FILES"
           echo "files=$FILES" >> $GITHUB_OUTPUT