Add x86_64-linux to PLATFORMS for Heroku deployment

Author: ChristopherJamesN

Gemfile.lock

@@ -147,6 +147,8 @@ GEM
     nio4r (2.5.8)
     nokogiri (1.13.7-arm64-darwin)
       racc (~> 1.4)
+    nokogiri (1.13.7-x86_64-linux)
+      racc (~> 1.4)
     orm_adapter (0.5.0)
     pg (1.4.1)
     public_suffix (4.0.7)
@@ -250,6 +252,7 @@ GEM
 
 PLATFORMS
   arm64-darwin-21
+  x86_64-linux
 
 DEPENDENCIES
   byebug