[BUG] RPM lint issue ambiguous python shebang

[tim77]

Describe the bug
In last v0.9.28 was added airplane-mode indicator script. It have minor issue which RPM linter consider as ERROR.

*** ERROR: ambiguous python shebang in /usr/lib/python3.12/site-packages/nwg_panel/executors/airplane_mode.py: #!/usr/bin/python. Change it to python3 (or python2) explicitly.

Expected behavior
Satisfied linter.

Desktop (please complete the following information):

• Linux distribution: Fedora
• Panel version 0.9.28

Additional context
Some minor warnings also could be fixed/improved:

mangling shebang in /usr/lib/python3.12/site-packages/nwg_panel/executors/au.sh from /usr/bin/env bash to #!/usr/bin/bash
mangling shebang in /usr/lib/python3.12/site-packages/nwg_panel/executors/check-notifications from /bin/bash to #!/usr/bin/bash
mangling shebang in /usr/lib/python3.12/site-packages/nwg_panel/executors/github.sh from /bin/bash to #!/usr/bin/bash
*** WARNING: ./usr/share/applications/nwg-panel-config.desktop is executable but has no shebang, removing executable bit

[tim77]

Thanks! New version built successfully without any build issue.

[nwg-piotr]

Great! Thanks for confirmation.