previousEditor and nextEditor shortcuts are mistakenly swapped

[avery-radmacher]

Ctrl + PgUp maps to "Previous Tab" in Notepad++, and Ctrl + PgDn maps to "Next Tab", but in vscode-notepadplusplus-keybindings the bindings are swapped.

Notepad++:

vscode-notepadplusplus-keybindings:

{
    "key": "ctrl+pageup",
    "command": "workbench.action.previousEditor"
},
{
    "key": "ctrl+pagedown",
    "command": "workbench.action.nextEditor"
},