update python version in github action

Signed-off-by: Jonathan Rayback <jrayback@gmail.com>

.github/workflows/main.yml

@@ -11,10 +11,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - name: Set up Python 3.10
+    - name: Set up Python 3.12.3
       uses: actions/setup-python@v2
       with:
-        python-version: 3.12.2
+        python-version: 3.12.3
     - name: Clear databases
       run: |
         rm -Rf /usr/local/var/keri/*