[hashicorp_vault] - update package spec to 2.9.0

[taylor-swanson]

What does this PR do?

Updates package spec to 2.9.0

[git-generate]
go run github.com/andrewkroh/go-examples/ecs-update@latest -ecs-version=8.8.0 -ecs-git-ref=v8.8.0 -format-version=2.9.0 packages/hashicorp_vault

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.

Related issues

• Relates elastic/security-team#5870

[elasticmachine]

💚 Build Succeeded

the below badges are clickable and redirect to their specific view in the CI or DOCS

Expand to view the summary

Build stats

• Start Time: 2023-07-20T13:49:48.414+0000

• Duration: 19 min 3 sec

Test stats 🧪

Test	Results
Failed	0
Passed	18
Skipped	0
Total	18

🤖 GitHub comments

Expand to view the GitHub comments

To re-run your PR in the CI, just comment with:

• /test : Re-trigger the build.

[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (2/2)	💚
Files	100.0% (3/3)	💚 5.882
Classes	100.0% (3/3)	💚 5.882
Methods	92.593% (25/27)	👍 6.731
Lines	86.124% (180/209)	👍 0.124
Conditionals	100.0% (0/0)	💚

[elasticmachine]

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