chore: revert html-proofer update

Signed-off-by: Aleksei Igrychev <aleksei.igrychev@palark.com>

docs/Gemfile

@@ -2,7 +2,7 @@ source "https://rubygems.org"
 
 gem "jekyll-assets", git: "https://github.com/envygeeks/jekyll-assets", group: :jekyll_plugins
 gem "jekyll"
-gem "html-proofer"
+gem 'html-proofer', '~> 3.3'
 gem "kramdown-parser-gfm"
 
 gem "sprockets", "~> 4.2", ">= 4.2.0"

docs/Gemfile.lock

@@ -42,15 +42,14 @@ GEM
     forwardable-extended (2.6.0)
     google-protobuf (3.22.2)
     google-protobuf (3.22.2-x86_64-linux)
-    html-proofer (4.4.3)
+    html-proofer (3.19.4)
       addressable (~> 2.3)
       mercenary (~> 0.3)
       nokogiri (~> 1.13)
       parallel (~> 1.10)
       rainbow (~> 3.0)
       typhoeus (~> 1.3)
       yell (~> 2.0)
-      zeitwerk (~> 2.5)
     http_parser.rb (0.8.0)
     i18n (1.12.0)
       concurrent-ruby (~> 1.0)
@@ -110,7 +109,7 @@ GEM
     rexml (3.2.5)
     rouge (4.1.0)
     safe_yaml (1.0.5)
-    sass-embedded (1.59.2)
+    sass-embedded (1.59.3)
       google-protobuf (~> 3.21)
       rake (>= 10.0.0)
     sassc (2.4.0)
@@ -135,7 +134,7 @@ PLATFORMS
   x86_64-linux-musl
 
 DEPENDENCIES
-  html-proofer
+  html-proofer (~> 3.3)
   jekyll
   jekyll-assets!
   kramdown (>= 2.3.0)