fix(gh-actions): Fix nix flake update action for repos with pre-commit

Author: galin-s

scripts/commit_flake_update.bash

@@ -13,6 +13,8 @@ if ! git config --get user.name >/dev/null 2>&1 || \
 fi
 
 current_commit="$(git rev-parse HEAD)"
+export PRE_COMMIT_ALLOW_NO_CONFIG=1
+
 nix flake update --commit-lock-file
 commit_after_update="$(git rev-parse HEAD)"