Bump tflite-runtime from 2.8.0 to 2.9.1 (#240)

Bumps [tflite-runtime](https://www.tensorflow.org/lite/) from 2.8.0 to 2.9.1.

---
updated-dependencies:
- dependency-name: tflite-runtime
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.tflite.txt

@@ -1 +1 @@
-tflite-runtime==2.8.0
+tflite-runtime==2.9.1