NAT-328: fixed documentation issue from vale

gso/workflows/site/create_site.py

@@ -52,7 +52,7 @@ def initial_input_form_generator(product_name: str) -> FormGenerator:  # noqa: C
 
         @validator("site_name", allow_reuse=True)
         def site_name_must_be_valid(cls, site_name: str) -> str | NoReturn:
-            # Accept 3 chapital letters and only one ditigt after that terminate with $
+            # Accept 3 chapital letters and only one ditigt after capital letters.
             pattern = re.compile(r"^[A-Z]{3}[0-9]?$")
             if not bool(pattern.match(site_name)):
                 raise ValueError(f"Enter a valid site name similar looks like AMS, AMS1or LON9. Get: {site_name}")