Prevent ApolloError handling the manga category mutation result (#510)

Unclear what is causing the error or why this is fixing it, but without requesting the categories total count, the mutation fails on the first execution with "Uncaught (in promise) ApolloError: Cannot convert object to primitive value"

src/lib/graphql/mutations/MangaMutation.ts

@@ -106,6 +106,7 @@ export const UPDATE_MANGA_CATEGORIES = gql`
                             totalCount
                         }
                     }
+                    totalCount
                 }
             }
         }
@@ -125,6 +126,7 @@ export const UPDATE_MANGAS_CATEGORIES = gql`
                             totalCount
                         }
                     }
+                    totalCount
                 }
             }
         }