new_release.sh helper considers -v option as illegal
## From new_release.sh help:
```
Usage: ./helpers/new_release.sh [OPTION].. [MODE [BRANCH]]
Turris OS new releases managing tool.
Options:
-v Run script with verbose output
-h Print this help text
Modes:
verify
Run script in verify mode where BRANCH (in default hbk) is checked
for possible release problems. This is default.
...
```
## Expected behaviour:
`./helpers/new_release.sh -v verify` or `./helpers/new_release.sh -v` runs the script in "verify" mode with verbose output.
## Actual behaviour:
The script writes `Illegal option '-v'` to stdout and exits with code 1.
Happens in all branches.
issue