Update Jenkins jobs

Author: miriam-eid

.ci/jobs/elastic+elasticsearch-py+8.2.yml

@@ -1,12 +1,12 @@
 ---
 - job:
-    name: elastic+elasticsearch-py+6.x
-    display-name: 'elastic / elasticsearch-py # 6.x'
-    description: Testing the elasticsearch-py 6.x branch.
+    name: elastic+elasticsearch-py+8.3
+    display-name: 'elastic / elasticsearch-py # 8.3'
+    description: Testing the elasticsearch-py 8.3 branch.
     junit_results: "*-junit.xml"
     parameters:
     - string:
         name: branch_specifier
-        default: refs/heads/6.x
+        default: refs/heads/8.3
         description: the Git branch specifier to build (<branchName>, <tagName>,
           <commitId>, etc.)

.ci/jobs/elastic+elasticsearch-py+6.x.yml renamed to .ci/jobs/elastic+elasticsearch-py+8.3.yml

@@ -1,12 +1,12 @@
 ---
 - job:
-    name: elastic+elasticsearch-py+8.1
-    display-name: 'elastic / elasticsearch-py # 8.1'
-    description: Testing the elasticsearch-py 8.1 branch.
+    name: elastic+elasticsearch-py+8.4
+    display-name: 'elastic / elasticsearch-py # 8.4'
+    description: Testing the elasticsearch-py 8.4 branch.
     junit_results: "*-junit.xml"
     parameters:
     - string:
         name: branch_specifier
-        default: refs/heads/8.1
+        default: refs/heads/8.4
         description: the Git branch specifier to build (<branchName>, <tagName>,
           <commitId>, etc.)