Fix gemfile

Gemfile.lock

@@ -1,10 +1,21 @@
+PATH
+  remote: .
+  specs:
+    jekyll-theme-chirpy (3.0.3)
+      jekyll (~> 4.1)
+      jekyll-archives (~> 2.2)
+      jekyll-paginate (~> 1.1)
+      jekyll-redirect-from (~> 0.16)
+      jekyll-seo-tag (~> 2.7)
+      jekyll-sitemap (~> 1.4)
+
 GEM
   remote: https://rubygems.org/
   specs:
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
     colorator (1.1.0)
-    concurrent-ruby (1.1.7)
+    concurrent-ruby (1.1.8)
     em-websocket (0.5.2)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
@@ -22,7 +33,7 @@ GEM
       typhoeus (~> 1.3)
       yell (~> 2.0)
     http_parser.rb (0.6.0)
-    i18n (1.8.5)
+    i18n (1.8.7)
       concurrent-ruby (~> 1.0)
     jekyll (4.2.0)
       addressable (~> 2.4)
@@ -57,13 +68,11 @@ GEM
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
     liquid (4.0.3)
-    listen (3.3.3)
+    listen (3.4.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.4.0)
-    mini_portile2 (2.5.0)
-    nokogiri (1.11.1)
-      mini_portile2 (~> 2.5.0)
+    nokogiri (1.11.1-x86_64-darwin)
       racc (~> 1.4)
     nokogumbo (2.0.4)
       nokogiri (~> 1.8, >= 1.8.4)
@@ -88,23 +97,18 @@ GEM
       ethon (>= 0.9.0)
     tzinfo (1.2.9)
       thread_safe (~> 0.1)
-    tzinfo-data (1.2020.6)
+    tzinfo-data (1.2021.1)
       tzinfo (>= 1.0.0)
     unicode-display_width (1.7.0)
     wdm (0.1.1)
     yell (2.2.2)
 
 PLATFORMS
-  ruby
+  x86_64-darwin-20
 
 DEPENDENCIES
   html-proofer (~> 3.18)
-  jekyll (~> 4.1)
-  jekyll-archives (~> 2.2)
-  jekyll-paginate (~> 1.1)
-  jekyll-redirect-from (~> 0.16)
-  jekyll-seo-tag (~> 2.7)
-  jekyll-sitemap (~> 1.4)
+  jekyll-theme-chirpy!
   tzinfo (~> 1.2)
   tzinfo-data
   wdm (~> 0.1.1)