Fix bad markdown formatting install instructions. (#5822)

Co-authored-by: Guy Carmeli <guyca@users.noreply.github.com>

docs/docs/Installing.md

@@ -54,24 +54,24 @@
 	@end
 	```
 
-a. If, in Xcode, you see the following error message in `AppDelegate.m` next to `#import "RCTBundleURLProvider.h"`: 
-	```
-	! 'RCTBundleURLProvider.h' file not found
-	```
-	This is because the `React` scheme is missing from your project. You can verify this by opening the `Product` menu and the `Scheme` submenu. 
-	To make the `React` scheme available to your project, run `npm install -g react-native-git-upgrade` followed by `react-native-git-upgrade`. Once this is done, you can click back to the menu in Xcode: `Product -> Scheme -> Manage Schemes`, then click '+' to add a new scheme. From the `Target` menu, select "React", and click the checkbox to make the scheme `shared`. This should make the error disappear.
-
-	b. If, in Xcode, you see the following warning message in `AppDelegate.m` next to `#import "@implementation AppDelegate"`:
-	```
-	Class 'AppDelegate' does not conform to protocol 'RCTBridgeDelegate'
-	```
-	You can remove `RCTBridgeDelegate` from this file: `AppDelegate.h`:
-	```diff
-	- #import <React/RCTBridgeDelegate.h>
-	- @interface AppDelegate : UIResponder <UIApplicationDelegate, RCTBridgeDelegate>
-	+ @interface AppDelegate : UIResponder <UIApplicationDelegate>
-		...
-	```
+    a. If, in Xcode, you see the following error message in `AppDelegate.m` next to `#import "RCTBundleURLProvider.h"`: 
+  	```
+  	! 'RCTBundleURLProvider.h' file not found
+  	```
+  	This is because the `React` scheme is missing from your project. You can verify this by opening the `Product` menu and the `Scheme` submenu. 
+  	To make the `React` scheme available to your project, run `npm install -g react-native-git-upgrade` followed by `react-native-git-upgrade`. Once this is done, you can click back to the menu in Xcode: `Product -> Scheme -> Manage Schemes`, then click '+' to add a new scheme. From the `Target` menu, select "React", and click the checkbox to make the scheme `shared`. This should make the error disappear.
+
+    b. If, in Xcode, you see the following warning message in `AppDelegate.m` next to `#import "@implementation AppDelegate"`:
+  	```
+  	Class 'AppDelegate' does not conform to protocol 'RCTBridgeDelegate'
+  	```
+  	You can remove `RCTBridgeDelegate` from this file: `AppDelegate.h`:
+  	```diff
+  	- #import <React/RCTBridgeDelegate.h>
+  	- @interface AppDelegate : UIResponder <UIApplicationDelegate, RCTBridgeDelegate>
+  	+ @interface AppDelegate : UIResponder <UIApplicationDelegate>
+  		...
+  	```
 
 ### Installation with CocoaPods