docs: codeblock within a list should be indented

docs/ios_build_instructions.md

Index: docs/ios_build_instructions.md
diff --git a/docs/ios_build_instructions.md b/docs/ios_build_instructions.md
index a7d4f47a8da4f1bf516c1657008e85cc0b5d2c18..d609e944ec22d2eac61fa90f423bde0331662c7f 100644
--- a/docs/ios_build_instructions.md
+++ b/docs/ios_build_instructions.md
@@ -104,19 +104,19 @@ file.
 file (removing the `chromium_ios_signing=0` if you want to make
 developer-signed builds):
 
-```json
-{
-  "GYP_DEFINES" : "OS=ios chromium_ios_signing=0",
-  "GYP_GENERATORS" : "ninja,xcode-ninja",
-}
-```
+    ```json
+    {
+      "GYP_DEFINES" : "OS=ios chromium_ios_signing=0",
+      "GYP_GENERATORS" : "ninja,xcode-ninja",
+    }
+    ```
 
 3.  Make sure to sync again to fetch the iOS specific dependencies and
 regenerate build rules using:
 
-```shell
-gclient sync
-```
+    ```shell
+    gclient sync
+    ```
 
 ## Troubleshooting