feat: promisify netLog.stopLogging (#16862)

docs/api/net-log.md

@@ -7,12 +7,11 @@ Process: [Main](../glossary.md#main-process)
 ```javascript
 const { netLog } = require('electron')
 
-app.on('ready', function () {
+app.on('ready', async function () {
   netLog.startLogging('/path/to/net-log')
   // After some network events
-  netLog.stopLogging(path => {
-    console.log('Net-logs written to', path)
-  })
+  const path = await netLog.stopLogging()
+  console.log('Net-logs written to', path)
 })
 ```
 
@@ -36,6 +35,14 @@ Starts recording network events to `path`.
 
 Stops recording network events. If not called, net logging will automatically end when app quits.
 
+**[Deprecated Soon](promisification.md)**
+
+### `netLog.stopLogging()`
+
+Returns `Promise<String>` - resolves with a file path to which network logs were recorded.
+
+Stops recording network events. If not called, net logging will automatically end when app quits.
+
 ## Properties
 
 ### `netLog.currentlyLogging`