doc: test: Update link to Sparse documentation

Update the Sparse documentation to refer to the official Sparse
documentation instead of some random link, which no longeer works.

It also fixes an incorrect inline literal usage.

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

doc/develop/test/sparse.rst

@@ -3,7 +3,8 @@
 Sparse support
 ##############
 
-`Sparse <https://kernelnewbies.org/Sparse>`__ is a static code analysis tool.
+`Sparse <https://www.kernel.org/doc/html/latest/dev-tools/sparse.html>`__
+is a static code analysis tool.
 Apart from performing common code analysis tasks it also supports an
 ``address_space`` attribute, which allows introduction of distinct address
 spaces in C code with subsequent verification that pointers to different
@@ -18,7 +19,7 @@ Running with sparse
 *******************
 
 To run a sparse verification build :ref:`west build <west-building>` should be
-called with a `-DSPARSE=y` parameter, e.g.
+called with a ``-DSPARSE=y`` parameter, e.g.
 
 .. code-block:: shell