docs: dev-tools: correct Coccinelle version number

There is no Coccinelle version 1.2.  1.0.2 must be what was intended.
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

Documentation/dev-tools/coccinelle.rst

@@ -209,7 +209,7 @@ err.log will now have the profiling information, while stdout will
 provide some progress information as Coccinelle moves forward with
 work.
 
-DEBUG_FILE support is only supported when using coccinelle >= 1.2.
+DEBUG_FILE support is only supported when using coccinelle >= 1.0.2.
 
 .cocciconfig support
 --------------------