docs: add troubleshooting for Bun source-map indexing error

Author: isshaddad

docs/troubleshooting.mdx

@@ -97,6 +97,10 @@ export default defineConfig({
 
 If you see this error, add pino (and any other associated packages) to your `external` build settings in your `trigger.config.ts` file. Learn more about the `external` setting in the [config docs](/config/config-file#external).
 
+### `Failed to index deployment` with `Column must be greater than or equal to 0, got -1`
+
+This can occur when using `runtime: "bun"` during the indexing phase (we load and execute your task files to discover exports). A short-term workaround is to [pnpm patch](https://pnpm.io/cli/patch) the `source-map` package. See [this GitHub issue](https://github.com/triggerdotdev/trigger.dev/issues/3045) for the patch details.
+
 ### `reactDOMServer.renderToPipeableStream is not a function` when using react-email
 
 If you see this error when using `@react-email/render`: