Downgrade pitest-git-plugin due to compatibility issues (#1323)

* Update arcmutate plugin

* Update arcmutate plugin

* * downgrade pitest-git-plugin to 2.1.0 as automatic update appears to have broken our pipeline runs.

Author: MartinWheelerMT

service/build.gradle

@@ -75,8 +75,9 @@ dependencies {
 	testImplementation 'com.squareup.okhttp3:mockwebserver:4.12.0'
 	testImplementation 'com.adobe.testing:s3mock-testcontainers:4.7.0'
 
-	pitest 'com.arcmutate:base:1.3.2'
-	pitest 'com.arcmutate:pitest-git-plugin:2.2.4'
+
+    pitest 'com.arcmutate:base:1.3.2'
+    pitest 'com.arcmutate:pitest-git-plugin:2.1.0'
 }
 
 test {