Replace all instances of ray.readthedocs.io with ray.io (#7994)

python/ray/exceptions.py

@@ -142,7 +142,7 @@ class ObjectStoreFullError(RayError):
             "You can also try setting an option to fallback to LRU eviction "
             "when the object store is full by calling "
             "ray.init(lru_evict=True). See also: "
-            "https://ray.readthedocs.io/en/latest/memory-management.html.")
+            "https://docs.ray.io/en/latest/memory-management.html.")
 
 
 class UnreconstructableError(RayError):
@@ -167,7 +167,7 @@ class UnreconstructableError(RayError):
             "or setting object store limits with "
             "ray.remote(object_store_memory=<bytes>). See also: {}".format(
                 self.object_id.hex(),
-                "https://ray.readthedocs.io/en/latest/memory-management.html"))
+                "https://docs.ray.io/en/latest/memory-management.html"))
 
 
 class RayTimeoutError(RayError):