Add 8.3 CI job

Author: Anaethelion

.ci/jobs/elastic+go-elasticsearch+8.1.yml renamed to .ci/jobs/elastic+go-elasticsearch+8.3.yml

@@ -1,13 +1,13 @@
 ---
 - job:
-    name: elastic+go-elasticsearch+8.1
-    display-name: 'elastic / go-elasticsearch # 8.1'
-    description: Testing the go-elasticsearch 8.1 branch.
+    name: elastic+go-elasticsearch+8.3
+    display-name: 'elastic / go-elasticsearch # 8.3'
+    description: Testing the go-elasticsearch 8.3 branch.
     junit_results: "*-junit.xml"
     parameters:
       - string:
           name: branch_specifier
-          default: refs/heads/8.1
+          default: refs/heads/8.3
           description: The Git branch specifier to build
     triggers:
       - github