README.md: Core has a max Gradle of 6.9 as well.
@@ -11,7 +11,7 @@ The bitcoinj library is a Java implementation of the Bitcoin protocol, which all
### Technologies
-* Java 7+ and Gradle 4.4+ for the `core` module
+* Java 7+ and Gradle 4.4 - Gradle 6.9 for the `core` module
* Java 8+ and Gradle 4.4 - Gradle 6.9 for `tools` and `examples`
* Java 11+ and Gradle 4.10 - Gradle 6.9 for the JavaFX-based `wallettemplate`
* [Gradle](https://gradle.org/) - for building the project
