docs: drop paragraph around preformatted text

Signed-off-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>

docs/meson.html

@@ -196,11 +196,9 @@ is that they are guaranteed to persist across rebuilds and reconfigurations.
 This example sets -fmax-errors for compiling C sources and -DMAGIC=123
 for C++ sources:
 </p>
-<p>
 <pre>
 meson builddir/ -Dc_args=-fmax-errors=10 -Dcpp_args=-DMAGIC=123
 </pre>
-</p>
 </dd>