Fix Python Versions

Author: sirdrakeistda

.github/workflows/run_tests.yml

@@ -17,7 +17,7 @@ jobs:
       matrix:
         os: ["ubuntu-20.04", "macos-latest", "windows-latest"]
         # Remove Python 3.7.9 on 27 Jun 2023: https://endoflife.date/python
-        python-version: ["3.9.21", "3.10.16","3.11.11","3.12.8","3.13.1"]
+        python-version: ["3.9.20", "3.10.15","3.11.11","3.12.8","3.13.1"]
         pandas-version: ["1.2.5", "1.3.5", "1.4.3", "2.0.3","2.1.4" , ""]
 
         exclude: