Update docs/configurations.md

Co-authored-by: Nikhil Simha <simha.nikhil@gmail.com>

docs/configurations.md

@@ -13,7 +13,7 @@ $ ./multi-networkpolicy-iptables --help
 
 #### Add exceptional IPv6 prefix address to accept
 
-Some IPv6 network may require to accept traffic from/to specific address prefix for the network, such as multicast address (all routers multicast address, link-local address and so on). You can configure `--allow-ipv6-src-prefix` and `--allow-ipv6-dst-prefix` to specify which prefix should be accepted (even though network policy does not have it). Both option accepts comma separated IPv6 prefix list.
+Some IPv6 networks may require accepting traffic from/to specific address prefixes for the network, such as multicast address (all routers multicast address, link-local address and so on). You can configure `--allow-ipv6-src-prefix` and `--allow-ipv6-dst-prefix` to specify which prefix should be accepted (even though network policy does not have it). Both options accept comma separated IPv6 prefix list.
 
 ```
 --allow-ipv6-src-prefix=fe80::/10