[doc] Add description of examples directory to README.md. (#457)

diff --git a/README.md b/README.md
index 90f3aeb..ae14be6 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,7 @@
 | `CONTRIBUTING.md`             | Guidelines for contributing to CHIP                                                                           |
 | `CONTRIBUTORS.md`             | Contributors to CHIP                                                                                          |
 | `docs/`                       | Documentation                                                                                                 |
+| `examples/`                   | Example firmware applications that demonstrate use of CHIP technology                                         |
 | `integrations/`               | Third party integrations related to this project                                                              |
 | `integrations/github/`        | GitHub integrations related to this project                                                                   |
 | `integrations/github/actions` | GitHub actions related to this project                                                                        |