incorrect typo position reported for staticall

[AlbertoCentonze]

The Vyper grammar expects staticcall to be used as a keyword. However, when staticall (missing 'c') is typed, the error is incorrectly reported at a different location in the code. This misplacement of the error message makes it challenging to identify and fix what would otherwise be a simple typo.

Here's an example:

[charles-cooper]

at least a small improvement: #4226