chore: Revert to jgit 5.12.0.202106070339-r for 1.8 java support

Author: nidotls

pom.xml

@@ -72,13 +72,13 @@
         <dependency>
             <groupId>org.eclipse.jgit</groupId>
             <artifactId>org.eclipse.jgit</artifactId>
-            <version>6.0.0.202111291000-r</version>
+            <version>5.12.0.202106070339-r</version>
         </dependency>
 
         <dependency>
             <groupId>org.eclipse.jgit</groupId>
             <artifactId>org.eclipse.jgit.ssh.jsch</artifactId>
-            <version>6.0.0.202111291000-r</version>
+            <version>5.12.0.202106070339-r</version>
         </dependency>
 
         <dependency>