GitHub release - Source code assets are missing /libs/hbb_common submodule

Describe the bug
GitHub releases of source code tarballs (both .zip. and .tar.gz) are missing the /libs/hbb_common submodule.

The folder is present, but is empty.

For example:
Source code (tar.gz) for version 1.1.16.

This has been happening ever since version 1.1.13 (version 1.1.12 is the last one that contains the submodule)

Describe the environment
Source code releases from versions 1.1.13 (including) going forward.

How to Reproduce the bug
Steps to reproduce the behavior:

1. Go to releases page
2. Download a source code (.zip or .tar.gz)
3. Unpack
4. Observe contents of /libs/hbb_common directory is empty
5. [optional] Attempt to build the application

error: failed to load manifest for workspace member `rustdesk-server-1.1.16/libs/hbb_common`

Expected behavior
Source release should contain every submodule required to build the application.

Additional context
I believe it is caused by GitHub not including git submodules in automatically generated source code tarballs.
Since 1.1.13 (specifically Commit 7a509f6) the hbb_common lib is added as a submodule.

Possible solution would be to build the tarballs manually inside the build workflow.

References:

• https://github.com/orgs/community/discussions/31795
• https://github.com/dear-github/dear-github/issues/214

Start with .github/workflows/build.yaml and review how source release archives are produced, then compare the 1.1.12 and 1.1.13 release contents around libs/hbb_common. Reproduce the archive download and unpack steps, and verify that the resulting source archive includes the submodule and can load the workspace manifest successfully.