chore(ci): fix typo

Author: betaboon

.github/workflows/main.yml

@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', ' 3.13', 'pypy3.10']
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13', 'pypy3.10']
 
     steps:
     - uses: actions/checkout@v4