README: Java versions cheat sheet now covers Java 27

The resources block is generated from the website repository; it now
names the newest Java version in the cheat sheet description.

Author: SvenWoltmann

README.md

@@ -75,7 +75,7 @@ _(Hier geht's zur deutschen Version → [O-Notation Cheat Sheet](https://www.
 
 [<img src="/img/java-versions-cheat-sheet-mockup.png" alt="Java Versions PDF Cheat Sheet Mockup" width="468">](https://www.happycoders.eu/java-versions/)
 
-* Avoid lengthy research with this **concise overview of all Java versions from Java 10 to Java 26**.
+* Avoid lengthy research with this **concise overview of all Java versions from Java 10 to Java 27**.
 * **Discover the innovative features** of each new Java version, summarized on a single page.
 * **Impress your team** with your up-to-date knowledge of the latest Java version.