Update ruby Docker tag to v4

renovate[bot] · web-flow · commit 23fdb9483705 · 2026-01-13T20:11:11.000Z
diff --git a/Dockerfile b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.6.4
+FROM ruby:4.0.1
 
 RUN gem install danger-gitlab && \
   gem install danger-android_lint && \

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-FROM ruby:2.6.4`
	`1`	`+FROM ruby:4.0.1`
`2`	`2`
`3`	`3`	`RUN gem install danger-gitlab && \`
`4`	`4`	`gem install danger-android_lint && \`