[v1.17] Switch default Module resources path

[yurabakhtin]

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Refactor

The PR fulfills these requirements:

• It's submitted to the develop branch, not the master branch if no hotfix
• All tests are passing
• Changelog was modified

Other information:
https://github.com/humhub/humhub-internal/issues/52

[what-the-diff]

PR Summary

• Change in Default Module Resources Path
  The location where the system looks for module resources by default has been changed. Originally, it was searching under the 'assets' directory. Now, it will look in the 'resources' directory. This change makes our system more consistent with common naming practices.