Update dependency html-proofer to v5

Author: renovate[bot]

Gemfile.lock

@@ -46,6 +46,7 @@ GEM
       rake
     forwardable-extended (2.6.0)
     google-protobuf (3.24.4-arm64-darwin)
+    google-protobuf (3.24.4-x86_64-linux)
     html-proofer (4.4.3)
       addressable (~> 2.3)
       mercenary (~> 0.3)
@@ -124,6 +125,8 @@ GEM
     multi_json (1.15.0)
     nokogiri (1.15.4-arm64-darwin)
       racc (~> 1.4)
+    nokogiri (1.15.4-x86_64-linux)
+      racc (~> 1.4)
     openssl (3.2.0)
     parallel (1.23.0)
     pathutil (0.16.2)
@@ -140,8 +143,9 @@ GEM
     rexml (3.2.6)
     rouge (4.1.3)
     safe_yaml (1.0.5)
-    sass-embedded (1.63.6-arm64-darwin)
+    sass-embedded (1.63.6)
       google-protobuf (~> 3.23)
+      rake (>= 13.0.0)
     string_inflection (0.1.2)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
@@ -163,6 +167,7 @@ GEM
 
 PLATFORMS
   arm64-darwin-23
+  x86_64-linux
 
 DEPENDENCIES
   domainatrix