chore(jenkins): Update Jenkins plugins (#1406)

Author: gounthar

dockerfiles/plugins.txt

@@ -22,7 +22,7 @@ git-client:6.2.0
 git:5.7.0
 github-api:1.321-488.v9b_c0da_9533f8
 github-branch-source:1824.v046257273408
-github:1.43.0
+github:1.44.0
 gradle:2.15
 instance-identity:203.v15e81a_1b_7a_38
 ionicons-api:88.va_4187cb_eddf1