builder: fix regex to parse driver-opts

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

src/buildx/builder.ts

@@ -105,7 +105,7 @@ export class Builder {
           break;
         }
         case 'driver options': {
-          node['driver-opts'] = (value.match(/(\w+)="([^"]*)"/g) || []).map(v => v.replace(/^(.*)="(.*)"$/g, '$1=$2'));
+          node['driver-opts'] = (value.match(/([a-zA-Z0-9_.]+)="([^"]*)"/g) || []).map(v => v.replace(/^(.*)="(.*)"$/g, '$1=$2'));
           break;
         }
         case 'status': {