Fix deep linking (linux)

[gauthierpetetin]

No description provided.

[vinistevam]

Potential Solution election-builder

"linux": {
"icon": "build/icon.png",
"target": "AppImage",
"category": "Utility",
"artifactName": "metamask-desktop-${version}.${ext}",
"publish": {
"provider": "github"
},
"mimeTypes": [
"x-scheme-handler/metamask-desktop"
],
"desktop":{
"exec": "metamask-desktop %U"
}
},

[vinistevam]

Applied the solution above but it didn't work.
We can leave this ticket in the backlog for further investigation.