Bump rubyzip from 1.2.1 to 1.2.3 in /docs (#1008)

Bumps [rubyzip](https://github.com/rubyzip/rubyzip) from 1.2.1 to 1.2.3.
- [Release notes](https://github.com/rubyzip/rubyzip/releases)
- [Changelog](https://github.com/rubyzip/rubyzip/blob/master/Changelog.md)
- [Commits](rubyzip/rubyzip@v1.2.1...v1.2.3)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

docs/Gemfile.lock

@@ -223,7 +223,7 @@ GEM
     ruby-enum (0.7.2)
       i18n
     ruby_dep (1.5.0)
-    rubyzip (1.2.1)
+    rubyzip (1.2.3)
     safe_yaml (1.0.4)
     sass (3.5.6)
       sass-listen (~> 4.0.0)