Fixed URL in README.md

Pi-hole is found at examples/pi-hole, not examples/pihole. Quick typo fix.

Author: bramp

README.md

@@ -157,7 +157,7 @@ A [VPN](https://en.wikipedia.org/wiki/Virtual_private_network) is a mechanism fo
 - [AdGuard Home](examples/adguard-home) - AdGuard Home is a network-wide software for blocking ads and tracking.
 - [AdGuard Home Sync](examples/adguard-home-sync) - Synchronize AdGuardHome config to replica instances.
 - [Technitium DNS](examples/technitium-dns) - An open source authoritative as well as recursive DNS server that can be used for self hosting a DNS server for privacy & security.
-- [Pihole](examples/pihole) - Pi-hole is a Linux network-level advertisement and Internet tracker blocking application which acts as a DNS sinkhole and optionally a DHCP server, intended for use on a private network.
+- [Pi-hole](examples/pi-hole) - Pi-hole is a Linux network-level advertisement and Internet tracker blocking application which acts as a DNS sinkhole and optionally a DHCP server, intended for use on a private network.
 - [Cloudflare DDNS](examples/cloudflare-ddns) - Dynamic DNS (DDNS) is a service that keeps the DNS updated with a web property's correct IP address, even if that IP address is constantly being updated.
 
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