fix(ci): filename

Author: KisaragiEffective

.github/workflows/validate-renovate.yml

@@ -48,7 +48,7 @@ jobs:
           DIFF_TO_BE_REPORTED="$(mktemp)"
           mv "$DIFF_TO_BE_REPORTED" "${DIFF_TO_BE_REPORTED}.diff"
           echo "computing diff"
-          git diff --no-index "$OLD" "$NEW" >> "$DIFF_TO_BE_REPORTED.diff"
+          git diff --no-index "$OLD.old.txt" "$NEW.new.txt" >> "$DIFF_TO_BE_REPORTED.diff"
           echo "uploading"          
           printf 'DIFF=%s' "$(cat "$DIFF_TO_BE_REPORTED.diff")" >> "$GITHUB_OUTPUT"
       - name: report diff