telegraf: fix v1.18.2 source tarball sha256 hash

[cho-m]

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• Have you checked that there aren't other open pull requests for the same formula update/change?
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Pending on upstream confirmation of tarball update: influxdata/telegraf#9260
SHA256 mismatch failure seen in #76791 (comment)

For now, I haven't touched the livecheck as I don't know if the GitHub or download page is better to monitor.

[cho-m]

@nandahkrishna We have confirmation that retag was done by upstream due to an issue with Makefile in release.

Livecheck can probably remain as-is since Homebrew would have still hit the issue with homepage URL.

See: influxdata/telegraf#9260 (comment), quoted below with my own bolded parts:

Hi @ cho-m, when I built 1.18.2 there was a makefile bug that caused packages for a few platforms not to be built. I fixed the bug and retagged 1.18.2. This does appear to be the same situation as # 2140, so the resolution again is for us not to retag after packages have been published. I'll update our release documentation to highlight this policy.

Having Homebrew monitor https://portal.influxdata.com/downloads/ would not have helped this time since we published there before we noticed the missing packages.

Sorry for the inconvenience, and thanks for your work packaging Telegraf on Homebrew!

[nandahkrishna]

Thanks for checking, @cho-m. Is the revision bump required though?

[cho-m]

@nandahkrishna I think we can remove it as changes were some release (Makefile/CI) stuff and bottles built fine for Homebrew last time.

Not too sure what exact commit was used for last build, but I am guessing:
https://github.com/influxdata/telegraf/compare/00f754ab0a68ecb993b61e23794572a3ca56af23..v1.18.2