Merge pull request #10230 from hashicorp/consul-documentation-update

docs: updated the standard upgrade process

website/content/docs/upgrading/index.mdx

@@ -25,6 +25,7 @@ For upgrades we strive to ensure backwards compatibility. To support this,
 nodes gossip their protocol version and builds. This enables clients and
 servers to intelligently enable new features when available, or to gracefully
 fallback to a backward compatible mode of operation otherwise.
+Visit the [General Upgrade Process](https://www.consul.io/docs/upgrading/instructions/general-process) for a detailed upgrade guide.
 
 For most upgrades, the process is simple. Assuming the current version of
 Consul is A, and version B is released.