Update CONTRIBUTING.md (#1068)

Updating to call out listing examples alphabetically.

CONTRIBUTING.md

@@ -75,7 +75,7 @@ If you'd like to contribute example `.bicep` files that showcase abilities of th
 * Create an appropriately-named directory inside `docs/examples`. Note that the directory naming matches that of the [azure quickstart template repo](https://github.com/Azure/azure-quickstart-templates).
 * Include your file named `main.bicep`.
 * Compile the file using the Bicep CLI, and include the compiled `main.json` with your check-in.
-* Update the `src/playground/src/examples.ts` to import the newly defined `.bicep` file and then add it to the `examples` object with the name you'd like it to appear in the playground
+* Update the `src/playground/src/examples.ts` to import the newly defined `.bicep` file and then add it to the `examples` object with the name you'd like it to appear in the playground. Please note that examples are listed alphabetically under each folder to improve visibility when navigating within the playground.
 * Pull Request validation checks the following:
   1. All `.bicep` files in `docs/examples` can be compiled without errors.
   1. All `.bicep` files have a corresponding `.json` file which exactly matches that generated by the Bicep compiler.