build(electron-forge): set outDir to ./dist, to have the same behaviour as the Server builds

since we run electron-forge inside the ./build folder, we need to go up a directory (using ../dist), to have it output to ./dist

forge.config.cjs

@@ -11,6 +11,9 @@ const baseLinuxMakerConfigOptions = {
 };
 
 module.exports = {
+    // we run electron-forge inside the ./build folder,
+    // to have it output to ./dist, we need to go up a directory first
+    outDir: "../dist",
     packagerConfig: {
         executableName: "trilium",
         name: APP_NAME,