chore: add more v1 warnings (#505)

Author: bpmct

.github/workflows/release.yaml

@@ -101,7 +101,7 @@ jobs:
         with:
           tag_name: ${{ github.ref }}
           release_name: ${{ github.ref }}
-          body: ""
+          body: "> **Note**: This is the command line utility for [Coder v1](https://coder.com/docs/coder). If you are using [Coder v2 / Coder OSS](https://coder.com/docs/coder-oss/latest), use [these instructions](https://coder.com/docs/coder-oss/latest/install) to install the CLI."
           draft: true
           prerelease: false
 

README.md

@@ -3,5 +3,5 @@
 [![GitHub Release](https://img.shields.io/github/v/release/cdr/coder-cli?color=6b9ded&include_prerelease=false)](https://github.com/cdr/coder-cli/releases)
 [![Documentation](https://godoc.org/cdr.dev/coder-cli?status.svg)](https://pkg.go.dev/cdr.dev/coder-cli/coder-sdk)
 
-> **Note**: This is the command line utility for [Coder Classic](https://coder.com/docs/coder). If you are using [Coder v2 / Coder OSS](https://coder.com/docs/coder-oss/latest), use [these instructions](https://coder.com/docs/coder-oss/latest/install) to install the CLI.
+> **Note**: This is the command line utility for [Coder v1](https://coder.com/docs/coder). If you are using [Coder v2 / Coder OSS](https://coder.com/docs/coder-oss/latest), use [these instructions](https://coder.com/docs/coder-oss/latest/install) to install the CLI.