Update release notes

Author: okotek

Dockerfile.github_action_dockerhub

@@ -1 +1 @@
-FROM codiumai/pr-agent:github_action
+FROM codiumai/pr-agent:0.7-github_action

RELEASE_NOTES.md

@@ -8,17 +8,18 @@
 - codiumai/pr-agent:0.7-github_polling
 - codiumai/pr-agent:0.7-github_action
 
-### Added
-- 
+### Added::Algo
+- New tool /similar_issue - Currently on GitHub app and CLI: indexes the issues in the repo, find the most similar issues to the target issue.
+- Describe markers: Empower the /describe tool with a templating capability (see more details in https://github.com/Codium-ai/pr-agent/pull/273).
+- New feature in the /review tool - added an estimated effort estimation to the review (https://github.com/Codium-ai/pr-agent/pull/306).
 
-### Changed
-- 
+### Added::Infrastructure
+- Implementation of a GitLab webhook.
+- Implementation of a BitBucket app.
+
+### Fixed
+- Protection against no code suggestions generated.
+- Resilience to repositories where the languages cannot be automatically detected.
 
-### Deprecated
-- 
 
-### Removed
-- 
 
-### Fixed
--