bug: logo-threads.svg invalid XML declaration and redundant <g> wrapper

[shinokada]

Current Behavior

https://github.com/ionic-team/ionicons/blob/main/src/svg/logo-threads.svg?short_path=e184f07

The svg has the following problems:

• Redundant wrapper
• invalid XML declaration

Expected Behavior

Remove the redundant wrapper and add valid XML declaration.

Steps to Reproduce

See the code of https://github.com/ionic-team/ionicons/blob/main/src/svg/logo-threads.svg?short_path=e184f07

Code Reproduction URL

https://github.com/ionic-team/ionicons/blob/main/src/svg/logo-threads.svg?short_path=e184f07

Additional Information

No response