reduce test coverage for iterating

Author: TravisYeah

.github/workflows/cicd.yml

@@ -66,8 +66,8 @@ jobs:
 
     strategy:
       matrix:
-        python-version: [ "3.9", "3.10", "3.11", "3.12", "3.13"]
-        backend: [ "elasticsearch7", "elasticsearch8", "opensearch"]
+        python-version: ["3.13"]
+        backend: [ "elasticsearch8" ]
 
     name: Python ${{ matrix.python-version }} testing with ${{ matrix.backend }}