docs: kmsan: fix formatting of "Example report"

Add a blank line to make the sentence before the list render as a
separate paragraph, not a definition.

Fixes: 93858ae70c ("kmsan: add ReST documentation")
Suggested-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Alexander Potapenko <glider@google.com>
Link: https://lore.kernel.org/r/20221107142255.4038811-1-glider@google.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/dev-tools/kmsan.rst

@@ -67,6 +67,7 @@ uninitialized in the local variable, as well as the stack where the value was
 copied to another memory location before use.
 
 A use of uninitialized value ``v`` is reported by KMSAN in the following cases:
+
  - in a condition, e.g. ``if (v) { ... }``;
  - in an indexing or pointer dereferencing, e.g. ``array[v]`` or ``*v``;
  - when it is copied to userspace or hardware, e.g. ``copy_to_user(..., &v, ...)``;