Fixed the Codespell check

.github/workflows/codespell.yml

@@ -13,4 +13,4 @@ jobs:
         with:
           check_filenames: true
           skip: ./.git,./conformance/third_party,*.snk,*.pb,*.pb.cc,*.pb.h,./src/google/protobuf/testdata,./objectivec/Tests,./python/compatibility_tests/v2.5.0/tests/google/protobuf/internal
-          ignore_words_list: "alow,alse,ba,cleare,copyable,cloneable,dedup,dur,errorprone,files',fo,fundementals,hel,importd,inout,leapyear,nd,ois,ons,parseable,process',te,testof,ue,unparseable,wasn,wee,gae,keyserver,objext,od"
+          ignore_words_list: "alow,alse,ba,cleare,copyable,cloneable,dedup,dur,errorprone,files',fo,fundementals,hel,importd,inout,leapyear,nd,nin,ois,ons,parseable,process',te,testof,ue,unparseable,wasn,wee,gae,keyserver,objext,od"

objectivec/GPBMessage.m

@@ -82,7 +82,7 @@ static NSString *const kGPBDataCoderKey = @"GPBData";
   GPBExtensionDescriptor *autocreatorExtension_;
 
   // Message can only be mutated from one thread. But some *readonly* operations
-  // modifify internal state because they autocreate things. The
+  // modify internal state because they autocreate things. The
   // autocreatedExtensionMap_ is one such structure. Access during readonly
   // operations is protected via this semaphore.
   // NOTE: OSSpinLock may seem like a good fit here but Apple engineers have