unpin docker version in pre-commit hook (hadolint#814)

eliminating inconsistency. e.g. for version 2.10.0, pre-commit hooks points to outdated version https://github.com/hadolint/hadolint/blob/47e3022493cb0d51e5af21ee346d4b25bc02bfcd/.pre-commit-hooks.yaml#L7

Author: electriquo

.pre-commit-hooks.yaml

@@ -4,7 +4,7 @@
   description: Runs hadolint Docker image to lint Dockerfiles
   language: docker_image
   types: ["dockerfile"]
-  entry: ghcr.io/hadolint/hadolint:v2.9.3 hadolint
+  entry: ghcr.io/hadolint/hadolint hadolint
 - id: hadolint
   name: Lint Dockerfiles
   description: Runs hadolint to lint Dockerfiles