Apply suggestion from @johha

sethboyles · johha · sethboyles · commit 6acabaff501b · 2025-12-12T13:48:50.000-07:00
Co-authored-by: Johannes Haass &lt;johannes.haass@sap.com&gt;
diff --git a/Gemfile b/Gemfile
@@ -1,4 +1,4 @@
-ruby '3.2.6'
+ruby file: ".ruby-version"
 
 source 'https://rubygems.org'
 
