doc: doxygen: improve formatting for kconfig alias

\verbatim is not giving the right output as we need an inline literal.
Switch to \c instead.

Fixes #81595.

Signed-off-by: Benjamin Cabé <[email protected]>
(cherry picked from commit 83356e9)

Author: kartben

doc/zephyr.doxyfile.in

@@ -279,7 +279,7 @@ TAB_SIZE               = 8
 # with the commands \{ and \} for these it is advised to use the version @{ and
 # @} or use a double escape (\\{ and \\})
 
-ALIASES                = "kconfig{1}=\verbatim \1 \endverbatim" \
+ALIASES                = "kconfig{1}=\c \1" \
                          "req{1}=\ref ZEPH_\1 \"ZEPH-\1\"" \
                          "satisfy{1}=\xrefitem satisfy \"Satisfies requirement\" \"Requirement Implementation\" \1" \
                          "verify{1}=\xrefitem verify \"Verifies requirement\" \"Requirement Verification\" \1" \