Merge pull request #20436 from DreierF

* gh-20436:
  Update versiion of git-properties plugin shown in the docs

Closes gh-20436

spring-boot-project/spring-boot-docs/src/main/asciidoc/howto.adoc

@@ -2420,7 +2420,7 @@ Gradle users can achieve the same result by using the https://plugins.gradle.org
 [source,groovy,indent=0]
 ----
 	plugins {
-		id "com.gorylenko.gradle-git-properties" version "1.5.1"
+		id "com.gorylenko.gradle-git-properties" version "2.2.2"
 	}
 ----