Fix incompatibility with bson gem 5.0.0

Author: mshibuya

lib/rails_admin/adapters/mongoid.rb

@@ -31,6 +31,7 @@ def get(id, scope = scoped)
           Mongoid::Errors::InvalidFind
           Moped::Errors::InvalidObjectId
           BSON::InvalidObjectId
+          BSON::Error::InvalidObjectId
         ].exclude?(e.class.to_s)
       end
 

lib/rails_admin/adapters/mongoid/bson.rb

@@ -21,6 +21,7 @@ def parse_object_id(value)
               Moped::Errors::InvalidObjectId
               BSON::ObjectId::Invalid
               BSON::InvalidObjectId
+              BSON::Error::InvalidObjectId
             ].exclude?(e.class.to_s)
           end
         end