kernel-doc: Added "*" in $type_constants2 to fix 'make htmldocs' warning.

Fixed: WARNING: Inline literal start-string without end-string in
Documentation/core-api/workqueue.rst

Added "*" in $type_constants2 in kernel-doc script to include "*" in the
conversion to hightlights.
Previously: %WQ_* -->  ``WQ_``*
After Changes: %WQ_* -->  ``WQ_*``
Need for the fix: ``* is not recognized as a valid end-string for inline
literal.

Link: https://lore.kernel.org/linux-doc/[email protected]
Signed-off-by: Utkarsh Tripathi <[email protected]>
Suggested-by: Akira Yokosawa <[email protected]>
Reviewed-by: Akira Yokosawa <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Corbet <[email protected]>

Author: utkarsh-1905

scripts/kernel-doc

@@ -62,7 +62,7 @@ my $anon_struct_union = 0;
 
 # match expressions used to find embedded type information
 my $type_constant = '\b``([^\`]+)``\b';
-my $type_constant2 = '\%([-_\w]+)';
+my $type_constant2 = '\%([-_*\w]+)';
 my $type_func = '(\w+)\(\)';
 my $type_param = '\@(\w*((\.\w+)|(->\w+))*(\.\.\.)?)';
 my $type_param_ref = '([\!~\*]?)\@(\w*((\.\w+)|(->\w+))*(\.\.\.)?)';