Bump tzinfo from 1.2.9 to 1.2.10 in /docs (#2126)

Bumps [tzinfo](https://github.com/tzinfo/tzinfo) from 1.2.9 to 1.2.10.
- [Release notes](https://github.com/tzinfo/tzinfo/releases)
- [Changelog](https://github.com/tzinfo/tzinfo/blob/master/CHANGES.md)
- [Commits](https://github.com/tzinfo/tzinfo/compare/v1.2.9...v1.2.10)

---
updated-dependencies:
- dependency-name: tzinfo
  dependency-type: direct:production
...
Signed-off-by: Ndependabot[bot] <support@github.com>
Co-authored-by: Ndependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: NJeff Rasley <jerasley@microsoft.com>

docs/Gemfile.lock

@@ -14,7 +14,7 @@ GEM
       execjs
     coffee-script-source (1.11.1)
     colorator (1.1.0)
-    commonmarker (0.23.4)
+    commonmarker (0.17.13)
       ruby-enum (~> 0.5)
     concurrent-ruby (1.1.10)
     dnsruby (1.61.9)
@@ -275,7 +275,7 @@ GEM
     thread_safe (0.3.6)
     typhoeus (1.4.0)
       ethon (>= 0.9.0)
-    tzinfo (1.2.9)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     tzinfo-data (1.2021.5)
       tzinfo (>= 1.0.0)