gems: update dependencies

- remove explicit dependency webrick. it's not needed anymore
- force jekyll-multiple-languages-plugin version to 1.7.0, since
later versions currently break jekyll
- update Gemfile.lock

Gemfile

@@ -4,6 +4,5 @@ gem 'jekyll'
 gem 'jekyll-paginate'
 gem 'builder'
 gem 'wdm', '>= 0.1.0' if Gem.win_platform?
-gem 'jekyll-multiple-languages-plugin'
+gem 'jekyll-multiple-languages-plugin', '= 1.7.0'
 gem 'jekyll-feed'
-gem "webrick", "~> 1.7"

Gemfile.lock

@@ -1,67 +1,71 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.8.0)
+    addressable (2.8.1)
-      public_suffix (>= 2.0.2, < 5.0)
+      public_suffix (>= 2.0.2, < 6.0)
     builder (3.2.4)
     colorator (1.1.0)
-    concurrent-ruby (1.1.8)
+    concurrent-ruby (1.1.10)
-    em-websocket (0.5.2)
+    em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
-      http_parser.rb (~> 0.6.0)
+      http_parser.rb (~> 0)
     eventmachine (1.2.7)
-    ffi (1.15.0)
+    ffi (1.15.5)
     forwardable-extended (2.6.0)
-    http_parser.rb (0.6.0)
+    google-protobuf (3.21.12)
-    i18n (1.8.10)
+    http_parser.rb (0.8.0)
+    i18n (1.12.0)
       concurrent-ruby (~> 1.0)
-    jekyll (4.2.0)
+    jekyll (4.3.1)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
       i18n (~> 1.0)
-      jekyll-sass-converter (~> 2.0)
+      jekyll-sass-converter (>= 2.0, < 4.0)
       jekyll-watch (~> 2.0)
-      kramdown (~> 2.3)
+      kramdown (~> 2.3, >= 2.3.1)
       kramdown-parser-gfm (~> 1.0)
       liquid (~> 4.0)
-      mercenary (~> 0.4.0)
+      mercenary (>= 0.3.6, < 0.5)
       pathutil (~> 0.9)
-      rouge (~> 3.0)
+      rouge (>= 3.0, < 5.0)
       safe_yaml (~> 1.0)
-      terminal-table (~> 2.0)
+      terminal-table (>= 1.8, < 4.0)
-    jekyll-feed (0.15.1)
+      webrick (~> 1.7)
+    jekyll-feed (0.17.0)
       jekyll (>= 3.7, < 5.0)
     jekyll-multiple-languages-plugin (1.7.0)
       jekyll (>= 2.0, < 5.0)
     jekyll-paginate (1.1.0)
-    jekyll-sass-converter (2.1.0)
+    jekyll-sass-converter (3.0.0)
-      sassc (> 2.0.1, < 3.0)
+      sass-embedded (~> 1.54)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    kramdown (2.3.1)
+    kramdown (2.4.0)
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
     liquid (4.0.3)
-    listen (3.5.1)
+    listen (3.7.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.4.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.6)
+    public_suffix (5.0.1)
-    rb-fsevent (0.11.0)
+    rake (13.0.6)
+    rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rexml (3.2.5)
-    rouge (3.26.0)
+    rouge (4.0.1)
     safe_yaml (1.0.5)
-    sassc (2.4.0)
+    sass-embedded (1.57.1)
-      ffi (~> 1.9)
+      google-protobuf (~> 3.21)
-    terminal-table (2.0.0)
+      rake (>= 10.0.0)
-      unicode-display_width (~> 1.1, >= 1.1.1)
+    terminal-table (3.0.2)
-    unicode-display_width (1.7.0)
+      unicode-display_width (>= 1.1.1, < 3)
+    unicode-display_width (2.3.0)
     webrick (1.7.0)
 
 PLATFORMS
@@ -71,9 +75,8 @@ DEPENDENCIES
   builder
   jekyll
   jekyll-feed
-  jekyll-multiple-languages-plugin
+  jekyll-multiple-languages-plugin (= 1.7.0)
   jekyll-paginate
-  webrick (~> 1.7)
 
 BUNDLED WITH
    2.2.23