Bump amundsensearchlibrary from `c9cf67a` to `a9b206c` (#215)

Bumps [amundsensearchlibrary](https://github.com/lyft/amundsensearchlibrary) from `c9cf67a` to `a9b206c`.
- [Release notes](https://github.com/lyft/amundsensearchlibrary/releases)
- [Commits](https://github.com/lyft/amundsensearchlibrary/compare/c9cf67af15fbec0256df48da5f6fd531f22aeddd...a9b206c81b877ae123531ccb172ddcaaa96ca7a4)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

amundsensearchlibrary @ a9b206c8

-Subproject commit c9cf67af15fbec0256df48da5f6fd531f22aeddd
+Subproject commit a9b206c81b877ae123531ccb172ddcaaa96ca7a4