chore(deps): update python docker tag to v3.12.6

ai-ml/t5-model-serving/client-app/Dockerfile

@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM python:3.11.10-alpine
+FROM python:3.12.6-alpine
 
 ARG PORT=8050
 ENV PORT=${PORT}