Update core/time/timezone/tzdate.odin

Co-authored-by: Feoramund <[email protected]>

core/time/timezone/tzdate.odin

@@ -253,7 +253,7 @@ shortname :: proc(dt: datetime.DateTime) -> (name: string, success: bool) #optio
 Gets the timezone abbreviation/shortname for a given date.
 (ex: "PDT")
 
-WARNING: This is unsafe because it doesn't check if you datetime is valid, or your region contains a valid record
+WARNING: This is unsafe because it doesn't check if your datetime is valid or if your region contains a valid record.
 
 Inputs:
 - dt: The input datetime