check f-string linting one more time

src/sandpit/main.py

@@ -52,7 +52,7 @@ def bearing(lat1: float, lon1: float, lat2: float, lon2: float) -> float:
     :rtype: float
     """
 
-    print(f"{getenv("PATH","notfound")}")
+    print(f"{getenv('PATH','notfound')}")
     coordinates = lat1, lon1, lat2, lon2
     phi1, lambda1, phi2, lambda2 = [radians(c) for c in coordinates]
     y = sin(lambda2 - lambda1) * cos(phi2)