Merge pull request #635 from pareenaverma/content_review

Update _index.md

Author: pareenaverma

content/learning-paths/cross-platform/memory-latency/_index.md

@@ -32,6 +32,7 @@ shared_between:
     - servers-and-cloud-computing
     - laptops-and-desktops
     - embedded-systems
+    - smartphones-and-mobile
 
 ### FIXED, DO NOT MODIFY
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