Expanding Linux tests for latest Salt and Pytest

Author: scriptautomate-bc

.github/workflows/testing.yml

@@ -364,14 +364,15 @@ jobs:
         python-version:
           - "3.10"
         salt-version:
-          - "3006.9"
-          - "3007.1"
+          - "3006.12"
+          - "3007.3"
         pytest-version:
           - "7.4.0"
           - "8.0.0"
           - "8.1.1"
           - "8.2.0"
           - "8.3.3"
+          - "8.4.0"
 
     steps:
     - uses: actions/checkout@v4