build: bump faraday from 0.15.4 to 0.16.2 in /docs

Bumps [faraday](https://github.com/lostisland/faraday) from 0.15.4 to 0.16.2.
- [Release notes](https://github.com/lostisland/faraday/releases)
- [Changelog](https://github.com/lostisland/faraday/blob/master/CHANGELOG.md)
- [Commits](https://github.com/lostisland/faraday/compare/v0.15.4...v0.16.2

)

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

docs/Gemfile.lock

@@ -25,7 +25,7 @@ GEM
       ffi (>= 1.3.0)
     eventmachine (1.2.7)
     execjs (2.7.0)
-    faraday (0.15.4)
+    faraday (0.16.2)
       multipart-post (>= 1.2, < 3)
     ffi (1.11.1)
     forwardable-extended (2.6.0)