ci: fixup

Author: krogrammer

.github/workflows/license_check.yml

@@ -14,11 +14,7 @@ jobs:
         id: find-files
         shell: bash
         run: |
-          {
-            echo 'SOURCE_FILES=<<EOF'
-            $(find . -path "*/src/*" \( -name "*.java" -o -name "*.kt" -o -name "*.kts" \) -type f)"
-            echo EOF
-          } >> "$GITHUB_OUTPUT"
+          echo "SOURCE_FILES=$(find . -path "*/src/*" \( -name "*.java" -o -name "*.kt" -o -name "*.kts" \) -type f -exec printf "%s " {} \;)" >> "$GITHUB_OUTPUT"
 
       - name: Run addlicense
         uses: docker://ghcr.io/google/addlicense:v1.2.0