Fixed required version syntax

Author: emanlove

.github/workflows/CI.yml

@@ -10,8 +10,8 @@ jobs:
     strategy:
       matrix:
         python-version: [3.8, 3.13.0]  # pypy-3.9
-        rf-version: [6.1.1, 7.2.2 7.3]
-        selenium-version: [4.32.0 4.33.0]
+        rf-version: [6.1.1, 7.2.2, 7.3]
+        selenium-version: [4.32.0, 4.33.0]
         browser: [firefox, chrome, headlesschrome]  #edge
 
     steps: