RFR: 8263593: Fix multiple typos in hsdis README

[Henri Tremblay]

On Mon, 15 Mar 2021 16:09:26 GMT, Henri Tremblay <github.com+1216819+henri-tremblay at openjdk.org> wrote:

>> I'm already on https://www.oracle.com/technical-resources/oracle-contributor-agreement.html. How can I be recognized on github?
>
> I've fixed the new typos found by @hseigel

@hseigel Why is my commit message not accepted? Format looks good to me. What am I missing?

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PR: https://git.openjdk.java.net/jdk/pull/2685