docs: name the ork release archive for a Mac without Homebrew

The pages gave only `brew install orca-ae/tap/ork`. A new Mac has no Homebrew,
and installing it takes an administrator password. The release archive needs
neither.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014Nq3n2MeC9XrC31wYfdjZv

Author: sijie

docs/before-you-arrive.md

@@ -16,8 +16,10 @@ Everyone also needs:
 - `git` and a terminal that runs `bash`. On Windows that is WSL or Git Bash, on
   every path: the checks in the labs are `bash` commands.
 - [`ork`](https://github.com/orca-ae/orca-cli) (the Orca CLI), v0.6.0 or newer:
-  `brew install orca-ae/tap/ork`. All three paths use it for the first MCP login
-  in Lab 3, and for the checks in every lab. Check
+  `brew install orca-ae/tap/ork`, or a
+  [release archive](https://github.com/orca-ae/orca-cli/releases) unpacked onto
+  your `PATH`. All three paths use it for the first MCP login in Lab 3, and for
+  the checks in every lab. Check
   `ork agent vaults credentials create --help` for `--oauth-issuer` and
   `--oauth-allow-issuer-mismatch`: a build with those flags handles
   StreamNative's same-domain proxy issuer aliases and dynamic client

labs/local/00-set-up.md

@@ -10,7 +10,9 @@ part of the stack answers and the topic holds 246 logins.
 
 - **Docker** is running, with Compose v2 (`docker compose version`).
 - You have [`ork`](https://github.com/orca-ae/orca-cli) v0.6.0 or newer
-  (`brew install orca-ae/tap/ork`), and [`jq`](https://jqlang.org/download/).
+  (`brew install orca-ae/tap/ork`, or a
+  [release archive](https://github.com/orca-ae/orca-cli/releases) unpacked onto
+  your `PATH`), and [`jq`](https://jqlang.org/download/).
 - You have an **Anthropic API key**.
 - You cloned this repository, and installed **one** path: