Bump activesupport from 6.1.7.1 to 6.1.7.3 in /docs (#4149)

Bumps [activesupport](https://github.com/rails/rails) from 6.1.7.1 to 6.1.7.3.
- [Release notes](https://github.com/rails/rails/releases)
- [Changelog](https://github.com/rails/rails/blob/v7.0.4.3/activesupport/CHANGELOG.md)
- [Commits](rails/rails@v6.1.7.1...v6.1.7.3)

---
updated-dependencies:
- dependency-name: activesupport
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/Gemfile.lock

@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (6.1.7.1)
+    activesupport (6.1.7.3)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
@@ -16,7 +16,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.1.10)
+    concurrent-ruby (1.2.2)
     contracts (0.13.0)
     dotenv (2.7.6)
     erubis (2.7.0)
@@ -81,7 +81,7 @@ GEM
       middleman-core (>= 3.2)
       rouge (~> 2.0)
     mini_portile2 (2.8.0)
-    minitest (5.17.0)
+    minitest (5.18.0)
     nokogiri (1.13.10)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
@@ -112,12 +112,12 @@ GEM
     tilt (2.0.10)
     toml (0.3.0)
       parslet (>= 1.8.0, < 3.0.0)
-    tzinfo (2.0.5)
+    tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     uglifier (3.2.0)
       execjs (>= 0.3.0, < 3)
     webrick (1.7.0)
-    zeitwerk (2.6.6)
+    zeitwerk (2.6.7)
 
 PLATFORMS
   ruby