Updated test matrix to latest version for Python, Robot Framework, and Selenium

Update to ..
- Python up to now 3.13.0rc2
- Robot Framework from 7.0.1 to 7.1
- Selenium 4.23.1, 4.24.0, 4.25.0

Author: emanlove

.github/workflows/CI.yml

@@ -9,9 +9,9 @@ jobs:
     continue-on-error: true
     strategy:
       matrix:
-        python-version: [3.8, 3.12]  # pypy-3.9
-        rf-version: [6.1.1, 7.0.1]
-        selenium-version: [4.21.0, 4.22.0, 4.23.1, 4.24.0]
+        python-version: [3.8, 3.13.0rc2]  # pypy-3.9
+        rf-version: [6.1.1, 7.1]
+        selenium-version: [4.23.1, 4.24.0, 4.25.0]
         browser: [firefox, chrome, headlesschrome]  #edge
 
     steps: