Bump erb from 4.0.4 to 4.0.4.1 in /docs

Bumps [erb](https://github.com/ruby/erb) from 4.0.4 to 4.0.4.1.
- [Release notes](https://github.com/ruby/erb/releases)
- [Changelog](https://github.com/ruby/erb/blob/master/NEWS.md)
- [Commits](ruby/erb@v4.0.4...v4.0.4.1)

---
updated-dependencies:
- dependency-name: erb
  dependency-version: 4.0.4.1
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

docs/Gemfile.lock

@@ -15,7 +15,7 @@ GEM
       public_suffix (>= 2.0.2, < 7.0)
     base64 (0.2.0)
     bigdecimal (3.1.8)
-    cgi (0.4.2)
+    cgi (0.5.1)
     colorator (1.1.0)
     concurrent-ruby (1.2.3)
     connection_pool (2.4.1)
@@ -24,7 +24,7 @@ GEM
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
-    erb (4.0.4)
+    erb (4.0.4.1)
       cgi (>= 0.3.3)
     eventmachine (1.2.7)
     ffi (1.17.2-aarch64-linux-gnu)