Check for updates from the Targets view and the Extensions view; version 0.1.1

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -66,7 +66,9 @@ git.cernikovi.cz on start and every 10 minutes, and offers a newer one: Install
 downloads its `.vsix` and installs it. The repository is private, so it needs a
 Gitea access token with read access: **CMake: Set Gitea Token for CMake Helper
 Updates** (kept in VS Code's secret storage). **CMake: Check for CMake Helper
-Updates** looks now; `cmakeHelper.updates.check` turns it off.
+Updates** looks now; it's also in the Targets view's `…` menu and in the
+extension's context menu in the Extensions view. `cmakeHelper.updates.check`
+turns it off.
 
 A release is made by the CI on a `v*` tag matching the version in `package.json`.