[ntuple] fix typo in code comment

Co-authored-by: Silverweed <7806878+silverweed@users.noreply.github.com>

Author: jblomer

tree/ntuple/v7/src/RFieldMeta.cxx

@@ -413,7 +413,7 @@ void ROOT::RClassField::BeforeConnectPageSource(ROOT::Internal::RPageSource &pag
       rules = FindRules(&fieldDesc);
 
       // If the field's type name is not the on-disk name but we found a rule, we know it is valid to read
-      // on-disk data because we found the rule according to the on-disk (source) type name and version/checsksum.
+      // on-disk data because we found the rule according to the on-disk (source) type name and version/checksum.
       if ((GetTypeName() != fieldDesc.GetTypeName()) && rules.empty()) {
          throw RException(R__FAIL("incompatible type name for field " + GetFieldName() + ": " + GetTypeName() +
                                   " vs. " + fieldDesc.GetTypeName()));