Fix missing newline typo on ios docs

Summary: Missing newline in the docs is causing "rm -rf" command to get swallowed up by markdown. This diff fix that by adding a newline.

Differential Revision: D63037094

Author: Riandy

examples/demo-apps/apple_ios/LLaMA/README.md

@@ -40,7 +40,8 @@ Xcode will download and cache the package on the first run, which will take some
 
 Note: If you're running into any issues related to package dependencies, quit Xcode entirely, delete the whole executorch repo, clean the caches by running the command below in terminal and clone the repo again.
 
-```rm -rf \
+```
+rm -rf \
   ~/Library/org.swift.swiftpm \
   ~/Library/Caches/org.swift.swiftpm \
   ~/Library/Caches/com.apple.dt.Xcode \

examples/demo-apps/apple_ios/LLaMA/docs/delegates/mps_README.md

@@ -80,7 +80,8 @@ Open the project in Xcode.In Xcode, go to `File > Add Package Dependencies`. Pas
 
 Note: If you're running into any issues related to package dependencies, quit Xcode entirely, delete the whole executorch repo, clean the caches by running the command below in terminal and clone the repo again.
 
-```rm -rf \
+```
+rm -rf \
   ~/Library/org.swift.swiftpm \
   ~/Library/Caches/org.swift.swiftpm \
   ~/Library/Caches/com.apple.dt.Xcode \

examples/demo-apps/apple_ios/LLaMA/docs/delegates/xnnpack_README.md

@@ -80,7 +80,8 @@ Open the project in Xcode.In Xcode, go to `File > Add Package Dependencies`. Pas
 
 Note: If you're running into any issues related to package dependencies, quit Xcode entirely, delete the whole executorch repo, clean the caches by running the command below in terminal and clone the repo again.
 
-```rm -rf \
+```
+rm -rf \
   ~/Library/org.swift.swiftpm \
   ~/Library/Caches/org.swift.swiftpm \
   ~/Library/Caches/com.apple.dt.Xcode \