config.yml: Fix ruby version (#38446)

Ruby gems versions use a `.` here because they do not allow a `-` for this purpose

diff --git a/config.yml b/config.yml
index c3b592968d8fda3e38d8d02b303d9764f4c88aa9..fe3d9e86cc6a0be70d7d753ca052068af2e31fef 100644 (file)
--- a/config.yml
+++ b/config.yml
@@ -53,7 +53,7 @@ params:
   authors:              "Mark Otto, Jacob Thornton, and Bootstrap contributors"
 
   current_version:      "5.3.0-alpha3"
-  current_ruby_version: "5.3.0-alpha3"
+  current_ruby_version: "5.3.0.alpha3"
   docs_version:         "5.3"
   rfs_version:          "v10.0.0"
   github_org:           "https://github.com/twbs"