fix(): Move ESP_ZB_PACKED_STRUCT after union

[P-R-O-C-H-Y]

This PR fixes following compilation warnings:

note: attribute for 'union esp_zb_zcl_cluster_s::<unnamed>' must follow the 'union' keyword
warning: attribute ignored in declaration of 'union esp_zb_zcl_cluster_s::<unnamed>' [-Wattributes]

Changes tested using ESP-ZIGBEE-SDK in Arduino.

[chshu]

It will be included in the next release, thanks.

[P-R-O-C-H-Y]

Thanks! @chshu btw. is there any way to get some notification on new release?
Even in some internal MM channel or whatever.

[Hedda]

Thanks! @chshu btw. is there any way to get some notification on new release?

@chshu Slightly off-topic but why are releases not also tagged and published here on GitHub as well?

https://github.com/espressif/esp-zigbee-sdk/releases

https://github.com/espressif/esp-zigbee-sdk/tags

There are several benefits to users if there are GitHub releases released here and version/revision tags:

https://docs.github.com/en/repositories/releasing-projects-on-github/about-releases

https://docs.github.com/en/repositories/releasing-projects-on-github/viewing-your-repositorys-releases-and-tags