heapsort.java

[gva-cse]

Closes # <Do NOT delete this template> Description: <Remove this line and provide a description. The title should be short and relevant.>

Checklist

<Put an x between square brackets wherever appropriate without any spaces like [x]>

• [x] I've followed the Contributing guidelines provided in the repository.
• [x] I've made the changes which were demanded in the linked issue.
• [x] My code gave a clean output on debugging. (NO warnings/errors)