Bump html-proofer from 5.1.0 to 5.1.1 (#94)

Bumps [html-proofer](https://github.com/gjtorikian/html-proofer) from 5.1.0 to 5.1.1.
- [Release notes](https://github.com/gjtorikian/html-proofer/releases)
- [Changelog](https://github.com/gjtorikian/html-proofer/blob/main/CHANGELOG.md)
- [Commits](gjtorikian/html-proofer@v5.1.0...v5.1.1)

---
updated-dependencies:
- dependency-name: html-proofer
  dependency-version: 5.1.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -12,6 +12,7 @@ GEM
       metrics (~> 0.12)
       traces (~> 0.18)
     base64 (0.3.0)
+    benchmark (0.5.0)
     bigdecimal (3.3.1)
     colorator (1.1.0)
     concurrent-ruby (1.3.5)
@@ -70,9 +71,10 @@ GEM
       bigdecimal
       rake (>= 13)
     hashery (2.1.2)
-    html-proofer (5.1.0)
+    html-proofer (5.1.1)
       addressable (~> 2.3)
       async (~> 2.1)
+      benchmark (~> 0.5)
       nokogiri (~> 1.13)
       pdf-reader (~> 2.11)
       rainbow (~> 3.0)
@@ -82,7 +84,7 @@ GEM
     http_parser.rb (0.8.0)
     i18n (1.14.7)
       concurrent-ruby (~> 1.0)
-    io-event (1.14.0)
+    io-event (1.14.2)
     jekyll (4.4.1)
       addressable (~> 2.4)
       base64 (~> 0.2)