docs: link the changelog entries to #305

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: quickbeard

CHANGELOG.md

@@ -63,7 +63,7 @@ file is the human-readable summary of what changed and why.
   per run rather than every time a check comes back. If automatic downloading
   is off, the dialog offers **Download** first and switches to **Install and
   restart** when it lands.
-  ([#PR](https://github.com/quickbeard/codev-code/pull/PR))
+  ([#305](https://github.com/quickbeard/codev-code/pull/305))
 - **The terminal app asks about updates instead of ignoring them** — `codev`
   checked for a new version a second after launch and announced it with an
   internal event that the interface subscribes to as it starts up. The check
@@ -74,7 +74,7 @@ file is the human-readable summary of what changed and why.
   including a patch release: only `"autoupdate": true` in your config installs
   patches by itself, `"notify"` and the default both ask, and `false` (or
   `CODEV_DISABLE_AUTOUPDATE`) still skips the check entirely.
-  ([#PR](https://github.com/quickbeard/codev-code/pull/PR))
+  ([#305](https://github.com/quickbeard/codev-code/pull/305))
 - **You can now decide when CoDev updates itself** — it checked for updates at
   launch and every ten minutes after, and downloaded whatever it found straight
   away, with no way to say otherwise. Settings → General → Updates now has two