ci: use python 3.12 in build workflow

Author: rwilliamspbg-ops

.github/workflows/build.yml

@@ -48,7 +48,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405
         with:
-          python-version: '3.10'
+          python-version: '3.12'
 
       - name: Set up Go
         uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00