doc/style: CLang -> Clang

It's not the way it is usually written (see https://clang.llvm.org/

).

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Damien Hedde <damien.hedde@greensocs.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20220420132624.2439741-17-marcandre.lureau@redhat.com>

docs/devel/style.rst

@@ -522,7 +522,7 @@ documented in the GNU Compiler Collection manual starting at version 4.0.
 Automatic memory deallocation
 =============================
 
-QEMU has a mandatory dependency either the GCC or CLang compiler. As
+QEMU has a mandatory dependency on either the GCC or the Clang compiler. As
 such it has the freedom to make use of a C language extension for
 automatically running a cleanup function when a stack variable goes
 out of scope. This can be used to simplify function cleanup paths,