docs(Filesystem): use await in writeFile example

[bvx89]

Updated the example-code for the Filesystem.writeFile({ ... })-method to include the await keyword.

[jcesarmobile]

To be able to use await, then fileWrite function should be async.

Since there is nothing going on after writeFile, it's not really necessary to await, but if you want to add it you need to make the function async

[bvx89]

https://capacitor.ionicframework.com/docs/apis/filesystem#method-writeFile-0

It says in the documentation that it returns a promise. It's not strictly necessary to await, but the example code uses a try-catch that would never catch anything.

Edit: Okay, I understand what you mean. My point still stands that the try-catch wouldn't catch anything, but I will add the async prefix to the example function as well.

[jcesarmobile]

Yeah, you are right, it won't catch anything unless you await.
Well spotted!