build:gradle: Temporary workaround for issue by using java 8 (related…

… with 99bc85d and gradle plugin gradle-git-properties).

Not sure when, but just started giving error on the CI.
See n0mer/gradle-git-properties#195.

build.gradle

@@ -4,6 +4,16 @@
 // @author: Paulo Dias                                             //
 /////////////////////////////////////////////////////////////////////
 
+buildscript {
+    dependencies {
+        // Temporary fix for the gorylenko v2.3.1 plugin
+        classpath ('org.eclipse.jgit:org.eclipse.jgit:') {
+            version {
+                strictly '5.13.0.202109080827-r'
+            }
+        }
+    }
+}
 plugins {
     id 'java' //apply false
     id 'application'