build(deps): bump deps/build/addonfactory_test_matrix_splunk

Bumps [deps/build/addonfactory_test_matrix_splunk](https://github.com/splunk/addonfactory_test_matrix_splunk) from `1bd232a` to `ea15e7d`.
- [Release notes](https://github.com/splunk/addonfactory_test_matrix_splunk/releases)
- [Commits](splunk/addonfactory_test_matrix_splunk@1bd232a...ea15e7d)

---
updated-dependencies:
- dependency-name: deps/build/addonfactory_test_matrix_splunk
  dependency-type: direct:production
...

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Author: dependabot[bot]