dev: bump alpine from 3.22 to 3.23

Bumps alpine from 3.22 to 3.23.

---
updated-dependencies:
- dependency-name: alpine
  dependency-version: '3.23'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Dockerfile

@@ -12,7 +12,7 @@ RUN rm -rf /srv/ttn-lorawan/lorawan-frequency-plans/.git
 COPY data/lorawan-webhook-templates /srv/ttn-lorawan/lorawan-webhook-templates
 RUN rm -rf /srv/ttn-lorawan/lorawan-webhook-templates/.git
 
-FROM alpine:3.22
+FROM alpine:3.23
 
 RUN addgroup -g 886 thethings && \
     adduser -u 886 -S -G thethings thethings && \