fix: add linux to gemlock

Gemfile.lock

@@ -38,6 +38,7 @@ GEM
       faraday-net_http (>= 2.0, < 3.2)
     faraday-net_http (3.1.0)
       net-http
+    ffi (1.16.3)
     ffi (1.16.3-x64-mingw-ucrt)
     forwardable-extended (2.6.0)
     gemoji (4.1.0)
@@ -225,6 +226,8 @@ GEM
       uri
     nokogiri (1.16.4-x64-mingw-ucrt)
       racc (~> 1.4)
+    nokogiri (1.16.4-x86_64-linux)
+      racc (~> 1.4)
     octokit (4.25.1)
       faraday (>= 1, < 3)
       sawyer (~> 0.9)
@@ -271,19 +274,19 @@ GEM
       concurrent-ruby (~> 1.0)
     unf (0.1.4)
       unf_ext
+    unf_ext (0.0.9.1)
     unf_ext (0.0.9.1-x64-mingw-ucrt)
     unicode-display_width (1.8.0)
     uri (0.13.0)
     webrick (1.8.1)
 
 PLATFORMS
   x64-mingw-ucrt
+  x86_64-linux
 
 DEPENDENCIES
   github-pages
   jekyll
-  jekyll-feed
-  jekyll-seo-tag
   minima
   nokogiri
   rack (~> 3.0.10)