Makes MP3 header files public for I2S code (espressif#8868)

* Makes MP3 header files public for I2S code

* Fix mdns version to 1.2.1

* commetary

Author: SuGlider

idf_component.yml

@@ -25,8 +25,11 @@ files:
     - "**/*"
 dependencies:
   idf: ">=5.1"
-  mdns: "^1.1.0"
-  chmorgan/esp-libhelix-mp3: "1.0.3"
+  # mdns 1.2.1 is necessary to build H2 with no WiFi
+  mdns: "1.2.1"
+  chmorgan/esp-libhelix-mp3:
+    version: "1.0.3"
+    require: public
   espressif/esp-zboss-lib: "^1.0.1"
   espressif/esp-zigbee-lib: "^1.0.1"
   esp-dsp: "^1.3.4"