Clarify when DataMisalignedException can be thrown

[The documentations for `DataMisalignedException` starts](https://docs.microsoft.com/en-us/dotnet/api/system.datamisalignedexception?view=netcore-3.1#remarks):

> Some microprocessors, such as 64-bit processors, can issue hardware exceptions when data is read or written to a misaligned address […]

If I understand it correctly, on .Net 5, this exception can be thrown on ARM, but not on x64, which makes the above phrase misleading. (I suspect the reference to 64-bit processors is about Itanium.) Should the above be updated to the following?

> Some processors, such as ARM, can issue hardware exceptions when data is read or written to a misaligned address […]