Fix typo in openssl-verification-options documentation.

CLA: trivial

Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com>
Reviewed-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from #24662)

(cherry picked from commit f159d86)

doc/man1/openssl-verification-options.pod

@@ -430,7 +430,7 @@ This option may be used multiple times.
 =item B<-policy> I<arg>
 
 Enable policy processing and add I<arg> to the user-initial-policy-set (see
-RFC5280). The policy I<arg> can be an object name an OID in numeric form.
+RFC5280). The policy I<arg> can be an object name or an OID in numeric form.
 This argument can appear more than once.
 
 =item B<-explicit_policy>