fix: add platform to gemfile

Author: Stef-Rousset

Gemfile.lock

@@ -363,6 +363,7 @@ GEM
     faraday-net_http (3.4.0)
       net-http (>= 0.5.0)
     ffi (1.17.1-x86_64-darwin)
+    ffi (1.17.1-x86_64-linux-gnu)
     file_validators (3.0.0)
       activemodel (>= 3.2)
       mime-types (>= 1.0)
@@ -490,6 +491,8 @@ GEM
     nio4r (2.7.4)
     nokogiri (1.16.8-x86_64-darwin)
       racc (~> 1.4)
+    nokogiri (1.16.8-x86_64-linux)
+      racc (~> 1.4)
     oauth (1.1.0)
       oauth-tty (~> 1.0, >= 1.0.1)
       snaky_hash (~> 2.0)
@@ -784,6 +787,7 @@ GEM
 
 PLATFORMS
   x86_64-darwin
+  x86_64-linux
 
 DEPENDENCIES
   bootsnap (~> 1.4)