s/bellow/below/

2024-02-15 15:50:43 +09:00 · 2024-02-15 15:50:43 +09:00 · 303852440a
--- a/doc/contributing/building_ruby.md
+++ b/doc/contributing/building_ruby.md
@ -42,7 +42,7 @@

 1. Download ruby source code:

-    Select one of the bellow.
+    Select one of the below.

    1. Build from the tarball: