Docs: removed incorrect Pp call in unitd.8.

Pp is used to separate paragraphs, not to introduce them.  A Pp macro
call right after Sh is wrong, and it is ignored by the formatter, which
reports a warning about it.

Signed-off-by: Alejandro Colomar <[email protected]>

Author: alejandro-colomar

docs/man/man8/unitd.8.in

@@ -71,7 +71,6 @@ The socket address of Unit's control API.
 .Pp
 SPDX-License-Identifier: Apache-2.0
 .Sh See also
-.Pp
 .Lk https://unit.nginx.org Website
 .Pp
 .Lk https://mailman.nginx.org/mailman/listinfo/unit "User mailing list"