fix: replace PCRE2 {,1} with ? for broader compatibility

[vimuxx]

No description provided.

[vimuxx]

This should fix the old AppImage region parsing bug

# ./Flameshot-14.0.0.x86_64.AppImage gui --region 100x100+100+100
"No Flameshot translation found for en-US, en-Latn-US, en, en, en-Latn-US, en-US"
"No Qt translation found for English"
flameshot: error: Invalid region, use 'WxH+X+Y' or 'all' or 'screen0/screen1/...'.
See flameshot --help.

[borgmanJeremy]

Is this an issue on the currently released app image? V14?

[vimuxx]

Is this an issue on the currently released app image? V14?

This bug is start from v13.2.0 appimage, also v14

root@debian:~/Downloads# ./Flameshot-12.1.0.x86_64.AppImage gui --region 100x100+100+100
QPainter::begin: Paint device returned engine == 0, type: 2
QPainter::setRenderHint: Painter must be active to set rendering hints
QPainter::setCompositionMode: Painter not active
QPainter::translate: Painter not active
QPainter::setPen: Painter not active
QPainter::setBrush: Painter not active
QPainter::setBrush: Painter not active
flameshot: info: Screenshot aborted.

root@debian:~/Downloads# ./Flameshot-13.2.0.x86_64.AppImage gui --region 100x100+100+100
"No Flameshot translation found for en-US, en, en-Latn-US, en, en-US, en-Latn-US"
"No Qt translation found for English"
flameshot: error: Invalid region, use 'WxH+X+Y' or 'all' or 'screen0/screen1/...'.
See flameshot --help.

root@debian:~/Downloads# ./Flameshot-13.3.0.x86_64.AppImage gui --region 100x100+100+100
"No Flameshot translation found for en-US, en, en-Latn-US, en, en-US, en-Latn-US"
"No Qt translation found for English"
flameshot: error: Invalid region, use 'WxH+X+Y' or 'all' or 'screen0/screen1/...'.
See flameshot --help.

root@debian:~/Downloads# ./Flameshot-14.0.0.x86_64.AppImage gui --region 100x100+100+100
"No Flameshot translation found for en-US, en-Latn-US, en, en, en-Latn-US, en-US"
"No Qt translation found for English"
flameshot: error: Invalid region, use 'WxH+X+Y' or 'all' or 'screen0/screen1/...'.
See flameshot --help.