ci/golangci-lint: add checks permission

This permission is now needed so that the linter can annotate code in a
PR (see [1]).

[1] golangci/golangci-lint-action@bc1904f

Signed-off-by: Kir Kolyshkin <[email protected]>

Author: kolyshkin

.github/workflows/validate.yml

@@ -25,6 +25,7 @@ jobs:
     permissions:
       contents: read
       pull-requests: read
+      checks: write # to allow the action to annotate code in the PR.
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4