Update instrumentation.rb

Co-authored-by: Kayla Reopelle (she/her) <87386821+kaylareopelle@users.noreply.github.com>

instrumentation/rack/lib/opentelemetry/instrumentation/rack/instrumentation.rb

@@ -28,7 +28,7 @@ class Instrumentation < OpenTelemetry::Instrumentation::Base
         option :url_quantization,         default: nil,   validate: :callable
         option :untraced_requests,        default: nil,   validate: :callable
         option :response_propagators,     default: [],    validate: :array
-        # This option is only valid for applicaitons using Rack 2.0 or greater
+        # This option is only valid for applications using Rack 2.0 or greater
         option :use_rack_events,          default: true, validate: :boolean
 
         # Temporary Helper for Sinatra and ActionPack middleware to use during installation