Use non deprecated name for America/Nuuk

CHANGES.rst

@@ -7,6 +7,7 @@ Changelog
 Minor changes:
 
 - Add funding information
+- Update windows to olson conversion for Greenland Standard Time
 
 Breaking changes:
 

src/icalendar/windows_to_olson.py

@@ -51,7 +51,7 @@ WINDOWS_TO_OLSON = {
     'GMT Standard Time': 'Europe/London',
     'GTB Standard Time': 'Europe/Bucharest',
     'Georgian Standard Time': 'Asia/Tbilisi',
-    'Greenland Standard Time': 'America/Godthab',
+    'Greenland Standard Time': 'America/Nuuk',
     'Greenwich Standard Time': 'Atlantic/Reykjavik',
     'Hawaiian Standard Time': 'Pacific/Honolulu',
     'India Standard Time': 'Asia/Kolkata',