[ci] Run pre-commit checks even on doc changes

Pre-commit is now required to merge PRs, so let it run even on documentation updates.
An alternative is to merge with administrator permissions, bypassing rules,
which is not a good practice.

Signed-off-by: Nick Volynkin <nick.volynkin@gmail.com>

.github/workflows/pre-commit.yml

@@ -3,8 +3,6 @@ name: Pre-Commit Checks
 on:
   pull_request:
     types: [labeled, opened, synchronize, reopened]
-    paths-ignore:
-      - '**.md'
 
 concurrency:
   group: pre-commit-${{ github.workflow }}-${{ github.event.pull_request.number }}