Tweak changelog to add thanks lines

Author: sirosen

CHANGELOG.rst

@@ -13,8 +13,8 @@ Unreleased
 - Update vendored schemas: bitbucket-pipelines, buildkite, compose-spec, dependabot,
   drone-ci, github-issue-forms, gitlab-ci, meltano, mergify, renovate, snapcraft,
   woodpecker-ci (2025-09-17)
-- Add GitHub issue config schema and pre-commit hook (:issue:`589`).
-- Add GitHub issue form schema and pre-commit hook (:issue:`588`).
+- Add GitHub issue config schema and pre-commit hook. Thanks :user:`vivodi`! (:issue:`589`).
+- Add GitHub issue form schema and pre-commit hook. Thanks :user:`vivodi`! (:issue:`588`).
 
 0.33.3
 ------