Update README.md

readme

Author: Ainura-Djumagulov

cloud-infrastructure/compute-including-hpc/compute-software/arm/README.md

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-# Placeholder
+# Using Porting Advisor for Graviton to check compatability of  Java Applications on X86 and ARM.
+
+
+This section includes a step-by-step manual for using Porting Advisor for Graviton to check the compatability of Java Applications on X86 and ARM.
 
 # License