Document cron triggers wrangler config format (#227)

Author: ObsidianMinor

products/workers/src/content/cli-wrangler/configuration.md

@@ -74,6 +74,9 @@ Keys to configure per project in your `wrangler.toml`.
 - `dev` <Type>not inherited</Type> <PropMeta>optional</PropMeta>
   - Arguments for `wrangler dev`, configure local server
 
+- `triggers` <Type>inherited</Type> <PropMeta>optional</PropMeta>
+  - Configures cron triggers for executing a Worker on a schedule
+
 </Definitions>
 
 ### vars
@@ -229,6 +232,20 @@ You can learn more about the standard patterns used for include and exclude in t
 
 Workers Sites projects use webpack by default. You can [bring your own webpack config](/cli-wrangler/webpack#using-with-workers-sites), however it is important to be cognizant of your `entry` and `context` settings.
 
+### triggers
+
+A set of cron triggers used to call a Worker on a schedule.
+
+Usage:
+
+```toml
+[triggers]
+crons = ["0 0 * JAN-JUN FRI", "0 0 LW JUL-DEC *"]
+```
+
+- `crons` optional
+  - A set of cron expressions, where each expression is a separate schedule to run the Worker on.
+
 ### dev
 
 Arguments for `wrangler dev` can be configured here so you don't have to repeatedly pass them.

products/workers/src/content/platform/cron-triggers/index.md

@@ -10,7 +10,7 @@ Cron Triggers allow users to map a cron expression to a Worker script using a [S
 
 ## Adding Cron Triggers
 
-Cron Triggers can be added to scripts with the Cloudflare API or in the dashboard on a [Workers Triggers tab](https://dash.cloudflare.com/?to=/:account/workers) up to the [per-script limit](/platform/limits).
+Cron Triggers can be added to scripts with the Cloudflare API, or in the dashboard on a [Workers Triggers tab](https://dash.cloudflare.com/?to=/:account/workers) up to the [per-script limit](/platform/limits). If a script is managed with Wrangler, Cron Triggers should be exclusively managed through the **`wrangler.toml`** file.
 
 ![workers-schedule-editor](./media/workers-schedule-editor.png)