chore(deps): bump ruby from 3.4.6-alpine3.21 to 3.4.7-alpine3.21 (#807)

Bumps ruby from 3.4.6-alpine3.21 to 3.4.7-alpine3.21.

---
updated-dependencies:
- dependency-name: ruby
  dependency-version: 3.4.7-alpine3.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Dockerfile

@@ -1,5 +1,5 @@
 # Stage 1: Build
-FROM ruby:3.4.6-alpine3.21 AS builder
+FROM ruby:3.4.7-alpine3.21 AS builder
 
 LABEL maintainer="Gil Desmarais <html2rss-web-docker@desmarais.de>"
 
@@ -23,7 +23,7 @@ RUN apk add --no-cache \
   && bundle binstubs bundler html2rss
 
 # Stage 2: Runtime
-FROM ruby:3.4.6-alpine3.21
+FROM ruby:3.4.7-alpine3.21
 
 LABEL maintainer="Gil Desmarais <html2rss-web-docker@desmarais.de>"