Edited issue template for concision

[Git-Good]

Improved readability and comprehension.

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This change is 

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[Git-Good]

I signed the CLA

[googlebot]

CLAs look good, thanks!

[nsthorat]

Looks good, couple small things then I will merge it. In generally I like the more concise language.

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Review status: 0 of 1 files reviewed at latest revision, all discussions resolved.

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ISSUE_TEMPLATE.md, line 3 at r1 (raw file):

To get help from the community, check out our [Google group](https://groups.google.com/a/tensorflow.org/forum/#!forum/tfjs).

Else, submit an issue based on the following template. 

s/Else/Otherwise

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ISSUE_TEMPLATE.md, line 5 at r1 (raw file):

Else, submit an issue based on the following template. 

Issue Template:

I would just remove this line

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Comments from Reviewable

[nsthorat]

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Review status: 0 of 1 files reviewed at latest revision, 2 unresolved discussions, some commit checks failed.

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Comments from Reviewable

[nsthorat]

Review status: 0 of 1 files reviewed at latest revision, 1 unresolved discussion, some commit checks pending.

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ISSUE_TEMPLATE.md, line 5 at r1 (raw file):

Previously, nsthorat (Nikhil Thorat) wrote…

I would just remove this line

Sorry, I actually meant remove this "Issue Template" line :) Then I will merge, apologies for the round trip!

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Comments from Reviewable

[caisq]

Ping @nsthorat?

[nsthorat]

Waiting for the removal of "Issue Template:" but maybe I should just merge and I'll do it.

[caisq]

@nsthorat FYI, you can apply edits to a PR on GitHub. Let me know if you need help finding out how to do that.

[nsthorat]

Done.