fix: sort and deduplicate OWNERS files in CODEOWNERS generation

Author: esolitos

.github/workflows/sync-codeowners.yml

@@ -35,7 +35,7 @@ jobs:
         run: |
           # Find all OWNERS files and generate CODEOWNERS content
           CODEOWNERS_CONTENT="# CODEOWNERS file\n# This file is automatically generated from the OWNERS files in the repository.\n# For more information, see: https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners\n\n"
-          for OWNERS_FILE in $(find . -name 'OWNERS'); do
+          for OWNERS_FILE in $(find . -name 'OWNERS' | sort -s --ignore-case --unique); do
             RELATIVE_PATH=$(dirname "$OWNERS_FILE")
             OWNERS=$(cat "$OWNERS_FILE" | xargs -n1 | sed 's/^/@/' | xargs)
             CODEOWNERS_CONTENT+="$RELATIVE_PATH/* $OWNERS\n"