Update to python3.12

The Issue https://community.opengroup.org/osdu/platform/security-and-compliance/policy/-/issues/150 haven't resolved CVE-2024-6345:

• Updated Python version to address CVE
• Fixed quote in Dockerfile (/bin/sh: 1: Syntax error: Unterminated quoted string):

app/tests/integration/test_python_version.py

@@ -10,6 +10,6 @@ def test_python_version():
     assert sys.version_info >= (3, 11, 0), f"Python version too low. {sys.version_info}"
     assert sys.version_info < (
         3,
-        11,
+        12,
         9999,
     ), f"Python version too new. {sys.version_info}"