chore(README): add attribution and update usage

README.md

@@ -10,19 +10,18 @@ Reimplementation of [cloudflare-dyndns](https://github.com/colemickens/cloudflar
 
 ## usage
 
-```shell
-Usage: cfdyndns [OPTIONS]
+```console
+Usage: cfdyndns [OPTIONS] --records <RECORDS>
 
 Options:
-  -r, --records <RECORDS>  Comma separated DNS records to update with the host's public IP [env:
-                           CLOUDFLARE_RECORDS=panzy.nrd.sh,panzy.nrd.sh,nrd.xp]
-  -t, --token <TOKEN>      recommended: The CloudFlare API token to authenticate with deprecated: The CloudFlare
-                           API key to authenticate with, also requires email [env: CLOUDFLARE_APITOKEN]
-  -k, --key <KEY>          deprecated: The CloudFlare email to authenticate with, also requires API key [env:
-                           CLOUDFLARE_APIKEY]
-  -e, --email <EMAIL>      [env: CLOUDFLARE_EMAIL=]
+  -r, --records <RECORDS>  Comma separated DNS records to update with the host's public IP [env: CLOUDFLARE_RECORDS=]
+  -t, --token <TOKEN>      recommended: The CloudFlare API token to authenticate with [env: CLOUDFLARE_APITOKEN]
+  -k, --key <KEY>          deprecated: The CloudFlare API key to authenticate with, also requires email [env: CLOUDFLARE_APIKEY]
+  -e, --email <EMAIL>      deprecated: The CloudFlare email to authenticate with, also requires API key [env: CLOUDFLARE_EMAIL=]
   -v, --verbose...         More output per occurrence
   -q, --quiet...           Less output per occurrence
+  -6                       set an AAAA record to the host's ipv6 address
+  -4                       set an A record to the host's ipv4 address
   -h, --help               Print help
   -V, --version            Print version
 ```
@@ -38,3 +37,7 @@ Options:
 ### uninstalling systemd service
 
 1. `make uninstall-systemd`
+
+### acknowledgement
+
+Special thanks to [colemickens](https://github.com/colemickens) for bootstrapping and transferring ownership of this project.