chore(deps): update python docker tag to v3.15.2 (#68)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

gatus/backup-check.yaml

@@ -256,7 +256,7 @@ spec:
               type: RuntimeDefault
           containers:
             - name: check
-              image: python:3.15.1-alpine3.24
+              image: python:3.15.2-alpine3.24
               command: ["python", "/script/check.py"]
               env:
                 - name: PYTHONDONTWRITEBYTECODE