chore(deps): update python docker tag to v3.15

Dockerfile

@@ -1,5 +1,5 @@
 # trunk-ignore-all(checkov/CKV_DOCKER_3)
-FROM python:3.14-slim
+FROM python:3.15-slim
 
 LABEL org.opencontainers.image.source https://github.com/MeshAddicts/meshinfo
 LABEL org.opencontainers.image.description "Realtime web UI to run against a Meshtastic regional or private mesh network."

Dockerfile.buildings

@@ -1,7 +1,7 @@
 # One-shot bake image. Run via `docker compose --profile bake run --rm building-bake`.
 # rasterio's manylinux wheels link against libexpat which python:slim variants
 # don't bundle — install it explicitly.
-FROM python:3.14-slim
+FROM python:3.15-slim
 
 RUN apt-get update \
     && apt-get install -y --no-install-recommends libexpat1 \

Dockerfile.canopy

@@ -1,7 +1,7 @@
 # One-shot bake image. Run via `docker compose --profile bake run --rm canopy-bake`.
 # rasterio's manylinux wheels link against libexpat which python:slim variants
 # don't bundle — install it explicitly.
-FROM python:3.14-slim
+FROM python:3.15-slim
 
 RUN apt-get update \
     && apt-get install -y --no-install-recommends libexpat1 \

Dockerfile.landcover

@@ -1,7 +1,7 @@
 # One-shot bake image. Run via `docker compose --profile bake run --rm landcover-bake`.
 # rasterio's manylinux wheels link against libexpat which python:slim variants
 # don't bundle — install it explicitly.
-FROM python:3.14-slim
+FROM python:3.15-slim
 
 RUN apt-get update \
     && apt-get install -y --no-install-recommends libexpat1 \