fix link to time function from time_ns doc (GH-15285)

Because mod, func, class, etc all share one namespace, :func:time creates a link to the time module doc page rather than the time.time function.

diff --git a/Doc/library/time.rst b/Doc/library/time.rst
index 6d0ceafa522ad6949a79aa0b4b25adb2cfbf3408..4faa0bbebc5b1f3fe16a23f7a45c32d9ba3807be 100644 (file)
--- a/Doc/library/time.rst
+++ b/Doc/library/time.rst
@@ -608,7 +608,7 @@ Functions
 
 .. function:: time_ns() -> int
 
-   Similar to :func:`time` but returns time as an integer number of nanoseconds
+   Similar to :func:`~time.time` but returns time as an integer number of nanoseconds
    since the epoch_.
 
    .. versionadded:: 3.7