Fix Rubygems link to README.md (#38459)

diff --git a/site/content/docs/5.3/getting-started/download.md b/site/content/docs/5.3/getting-started/download.md
index f3965807a59f951fa6f66fdc64c91b0ed62b038c..a1b8bfd9a732ca213cd90e69a0b34ce827ab4f0a 100644 (file)
--- a/site/content/docs/5.3/getting-started/download.md
+++ b/site/content/docs/5.3/getting-started/download.md
@@ -96,7 +96,7 @@ Alternatively, if you're not using Bundler, you can install the gem by running t
 gem install bootstrap -v {{< param current_ruby_version >}}
 ```
 
-[See the gem's README](https://github.com/twbs/bootstrap-rubygem/blob/master/README.md) for further details.
+[See the gem's README](https://github.com/twbs/bootstrap-rubygem/blob/main/README.md) for further details.
 
 ### Composer