Bump uri from 0.13.2 to 0.13.3 in /docs

Bumps [uri](https://github.com/ruby/uri) from 0.13.2 to 0.13.3.
- [Release notes](https://github.com/ruby/uri/releases)
- [Commits](ruby/uri@v0.13.2...v0.13.3)

---
updated-dependencies:
- dependency-name: uri
  dependency-version: 0.13.3
  dependency-type: indirect
...

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

Author: dependabot[bot]

docs/Gemfile.lock

@@ -257,7 +257,7 @@ GEM
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unicode-display_width (1.8.0)
-    uri (0.13.2)
+    uri (0.13.3)
     webrick (1.8.2)
 
 PLATFORMS