Bump numpy from 1.21.0 to 1.22.0 in /demos/audio_searching

Bumps [numpy](https://github.com/numpy/numpy) from 1.21.0 to 1.22.0.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/main/doc/HOWTO_RELEASE.rst)
- [Commits](https://github.com/numpy/numpy/compare/v1.21.0...v1.22.0)

---
updated-dependencies:
- dependency-name: numpy
  dependency-type: direct:production
...
Signed-off-by: Ndependabot[bot] <support@github.com>

demos/audio_searching/requirements.txt

@@ -2,7 +2,7 @@ diskcache==5.2.1
 dtaidistance==2.3.1
 fastapi
 librosa==0.8.0
-numpy==1.21.0
+numpy==1.22.0
 pydantic
 pymilvus==2.0.1
 pymysql