DOCS: Document OSSL_STORE_INFO_PUBKEY in doc/man3/OSSL_STORE_INFO.pod
Fixes
@@ -166,7 +166,11 @@ Key parameters.
=item OSSL_STORE_INFO_PKEY
-A private/public key of some sort.
+A keypair or just a private key (possibly with key parameters).
+
+=item OSSL_STORE_INFO_PUBKEY
+
+A public key (possibly with key parameters).
=item OSSL_STORE_INFO_CERT
