[Heartbeat] fix minor unreachable code

[Abirdcfly]

Signed-off-by: Abirdcfly [email protected]

• Cleanup

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• [x] My code follows the style guidelines of this project
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] I have made corresponding change to the default configuration files
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

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[elasticmachine]

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• Start Time: 2022-08-11T11:28:49.014+0000

• Duration: 75 min 4 sec

Test stats :test_tube:

Test	Results
Failed	0
Passed	6794
Skipped	737
Total	7531

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[Abirdcfly]

@Abirdcfly Please add an error check to the os.MkdirAll call. Otherwise LGTM

Done for make golangci-lint happy.

[mergify[bot]]

This pull request does not have a backport label. If this is a bug or security fix, could you label this PR @Abirdcfly? 🙏. For such, you'll need to label your PR with:

• The upcoming major version of the Elastic Stack
• The upcoming minor version of the Elastic Stack (if you're not pushing a breaking change) To fixup this pull request, you need to add the backport labels for the needed branches, such as:
• backport-v8./d.0 is the label to automatically backport to the 8./d branch. /d is the digit

[elasticmachine]

Pinging @elastic/security-external-integrations (Team:Security-External Integrations)

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Pinging @elastic/elastic-agent-data-plane (Team:Elastic-Agent-Data-Plane)

[epixa]

@cmacknz Are you able to take a look at this?

[cmacknz]

Didn't realize I was holding this up. Approved, and merged. Thanks!