fix(ci_5_4_2): Added v5.4.2 to CI

- add ESP-IDF v5.4.2 to CI for coverage
- https://github.com/espressif/esp-idf/releases/tag/v5.4.2

Author: SohKamYung-Espressif

.gitlab-ci.yml

@@ -79,7 +79,7 @@ build_idf_v5.4:
   image: espressif/idf:${IDF_VER}
   parallel:
     matrix:
-      - IDF_VER: ["v5.4", "v5.4.1", "release-v5.4"]
+      - IDF_VER: ["v5.4", "v5.4.1", "v5.4.2", "release-v5.4"]
         IDF_TARGET: ["esp32p4", "esp32h2"]
         IDF_SLAVE_TARGET: ["esp32c6"]
         IDF_EXAMPLE_PATH: examples/protocols/mqtt/tcp