Fix docs for /health endpoint & use application/graphql+-

[mangalaman93]

This change is 

[danielmai]

Reviewed 10 of 10 files at r1.
Reviewable status: all files reviewed, 2 unresolved discussions (waiting on @gitlw, @mangalaman93, @manishrjain, and @MichaelJCompton)

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wiki/content/clients/index.md, line 819 at r1 (raw file):

```json
{
  "version": "v1.0.12",

Use "v1.1.0", which will be a more realistic example within the docs. This version info in /health isn't in v1.0.12.

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wiki/content/clients/index.md, line 825 at r1 (raw file):

Here, uptime is in nanosecond (type time.Duration in Go).

nanoseconds (plural)

[mangalaman93]

Reviewable status: all files reviewed, 2 unresolved discussions (waiting on @danielmai, @gitlw, @manishrjain, and @MichaelJCompton)

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wiki/content/clients/index.md, line 819 at r1 (raw file):

Previously, danielmai (Daniel Mai) wrote…

Use "v1.1.0", which will be a more realistic example within the docs. This version info in /health isn't in v1.0.12.

Done.

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wiki/content/clients/index.md, line 825 at r1 (raw file):

Previously, danielmai (Daniel Mai) wrote…

nanoseconds (plural)

Done.

[MichaelJCompton]

👍 looks like you've touched the docs in all the spots

[danielmai]

Reviewed 1 of 1 files at r2.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @gitlw and @manishrjain)