📝 Normalize code tags

[ci skip]

docs/api/app.md

@@ -453,7 +453,7 @@ use this method to ensure single instance.
 An example of activating the window of primary instance when a second instance
 starts:
 
-```js
+```javascript
 var myWindow = null;
 
 var shouldQuit = app.makeSingleInstance(function(commandLine, workingDirectory) {
@@ -489,7 +489,7 @@ correctly when DWM composition is disabled).
 
 Usage example:
 
-```js
+```javascript
 let browserOptions = {width: 1000, height: 800};
 
 // Make the window transparent only if the platform supports it.

docs/api/browser-window.md

@@ -315,7 +315,7 @@ Commands are lowercased with underscores replaced with hyphens and the
 `APPCOMMAND_` prefix stripped off.
 e.g. `APPCOMMAND_BROWSER_BACKWARD` is emitted as `browser-backward`.
 
-```js
+```javascript
 someWindow.on('app-command', function(e, cmd) {
   // Navigate the window back when the user hits their mouse back button
   if (cmd === 'browser-backward' && someWindow.webContents.canGoBack()) {
@@ -682,7 +682,7 @@ Changes the attachment point for sheets on Mac OS X. By default, sheets are
 attached just below the window frame, but you may want to display them beneath
 a HTML-rendered toolbar. For example:
 
-```
+```javascript
 var toolbarRect = document.getElementById('toolbar').getBoundingClientRect();
 win.setSheetOffset(toolbarRect.height);
 ```

docs/api/process.md

@@ -23,7 +23,7 @@ beginning to load the web page or the main script.
 It can be used by the preload script to add removed Node global symbols back to
 the global scope when node integration is turned off:
 
-```js
+```javascript
 // preload.js
 var _setImmediate = setImmediate;
 var _clearImmediate = clearImmediate;