CI: Update python testing versions

Author: antoniovazquezblanco

.github/workflows/build.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["pypy3.9", "pypy3.10", "3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["pypy3.10", "pypy3.11", "3.10", "3.11", "3.12", "3.13", "3.14"]
 
     steps:
       - name: Checkout repository