Merge pull request #108 from backstage/renovate/python-3.x

Update python Docker tag to v3.15

Author: awanlin

Dockerfile

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM python:3.14-alpine@sha256:c6ead215bfd31f1e433d968853b7a769989117115b728874824e6c0a27cb96fc
+FROM python:3.15-alpine@sha256:ff4d3c9b1a48f646eedd93182aaea385c7a5452f4c8a8cd7cef686babacf4928
 
 RUN apk update && apk --no-cache add gcc musl-dev openjdk17-jdk curl graphviz ttf-dejavu fontconfig