Fix minimal Gradle version
This has to be 4.8 as some of the Provider methods were introduced later than 4.3.
@@ -7,7 +7,7 @@ Docker remote API is handled by the https://github.com/docker-java/docker-java[D
Please refer to the library's documentation for more information on the supported Docker's client API and Docker server version.
[IMPORTANT]
-This plugin requires Gradle >= 4.3 to work properly.
+This plugin requires Gradle >= 4.8 to work properly.
=== Benefits
