Updated bug template.

The new template achieves the following:

- info to the bug reporter is commented out, making the report less cluttered
- adds info like the OS and compositor
- fixes some minor formatting issues
1 job for update_docs in 1 minute and 4 seconds (queued for 1 second)
Status Name Job ID Coverage
  Build
passed build-native #5422
librem5

00:01:04