Fix spelling mistake

Author: MasterDuke17

doc/Language/typesystem.pod6

@@ -282,11 +282,11 @@ Returns a list with key and value of the enum-pair.
 
 TODO
 
-=head3 Versioning and Authership
+=head3 Versioning and Authorship
 
-Versioning and authership can be applied via adverbs C«:ver<>» and C«:auth<>.
+Versioning and authorship can be applied via adverbs C«:ver<>» and C«:auth<>.
 Both take a string as argument, for C<:ver> the string is converted to a
-L<Version|/type/Version> object. To query a modules version and auther use
+L<Version|/type/Version> object. To query a modules version and author use
 C<.^ver> and C<^.auth>.
 
     module M:ver<4.2.3>:auth<me@here.local> {}
@@ -295,19 +295,19 @@ C<.^ver> and C<^.auth>.
 
 =head2 C<package>
 
-=head3 Versioning and Authership
+=head3 Versioning and Authorship
 
 TODO
 
 =head2 C<grammar>
 
 TODO
 
-=head3 Versioning and Authership
+=head3 Versioning and Authorship
 
-Versioning and authership can be applied via adverbs C«:ver<>» and C«:auth<>.
+Versioning and authorship can be applied via adverbs C«:ver<>» and C«:auth<>.
 Both take a string as argument, for C<:ver> the string is converted to a
-L<Version|/type/Version> object. To query a grammars version and auther use
+L<Version|/type/Version> object. To query a grammars version and author use
 C<.^ver> and C<^.auth>.
 
     grammar G:ver<4.2.3>:auth<me@here.local> {}