Add Deno mention to README

Follow up to #77

Author: delucis

README.md

@@ -12,7 +12,7 @@ For more information, please see our complete deployment guide—[Deploy your As
 
 - `path` - Optional: the root location of your Astro project inside the repository.
 - `node-version` - Optional: the specific version of Node that should be used to build your site. Defaults to `22`.
-- `package-manager` - Optional: the Node package manager that should be used to install dependencies and build your site. Automatically detected based on your lockfile. Accepted values: `npm`, `yarn`, `pnpm`, and `bun`. A version tag is also accepted, for example `[email protected]`, `pnpm@8`, or `bun@latest`. If not provided, version will default to `latest`.
+- `package-manager` - Optional: the Node package manager that should be used to install dependencies and build your site. Automatically detected based on your lockfile. Accepted values: `npm`, `yarn`, `pnpm`, `bun`, and `deno`. A version tag is also accepted, for example `[email protected]`, `pnpm@8`, `bun@latest`, or `[email protected]`. If not provided, version will default to `latest`.
 - `build-cmd` - Optional: the command to run to build your site. Defaults to `deno task build` for sites using Deno and to `<package-manager> run build` for all other package managers.
 
 ### Example workflow: