Documentation: Fix spelling mistake in hacking.rst

Fix `botton half locks` to `bottom half locks`.

Signed-off-by: Mushahid Hussain <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Corbet <[email protected]>

Author: SikkiLadho

Documentation/kernel-hacking/hacking.rst

@@ -120,7 +120,7 @@ You can tell you are in a softirq (or tasklet) using the
 .. warning::
 
     Beware that this will return a false positive if a
-    :ref:`botton half lock <local_bh_disable>` is held.
+    :ref:`bottom half lock <local_bh_disable>` is held.
 
 Some Basic Rules
 ================