Add: OpenTTD 15.0-RC2 announcement (#365)

Author: michicc

_posts/2025-12-13-openttd-15-0-rc2.md

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+---
+title: OpenTTD 15.0-RC2
+author: michi_cc
+---
+
+Today we release 15.0-RC2, the second release candidate for the upcoming release.
+You've found several issues in the first release candidate, mostly related to the expanded font rendering.
+In the interest of stability, we've backed most of them out again, for a return at a later date when the feature is more stable.
+As always, see the changelog for the full list.
+
+However, there is a good chance there are still some issues out there that haven't been found yet.
+Please help us hunt those down, and if you find one, you can [report them here](https://github.com/OpenTTD/OpenTTD/issues/new/choose).
+
+Translation updates are coming in every day, and while some languages are complete or are nearing completion, there are also translations with missing or outdated strings.
+If you are a translator, please see if [your language has any missing translations](https://translator.openttd.org/project/openttd-master).
+We greatly appreciate your contribution!
+
+* [Download](https://www.openttd.org/downloads/openttd-releases/testing.html)
+* [Changelog](https://cdn.openttd.org/openttd-releases/15.0-RC2/changelog.md)
+* [Bug tracker](https://github.com/OpenTTD/OpenTTD/issues)