Bump tensorflow in /machine-learning/image-classifier

Bumps [tensorflow](https://github.com/tensorflow/tensorflow) from 2.0.1 to 2.0.3.
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Changelog](https://github.com/tensorflow/tensorflow/blob/master/RELEASE.md)
- [Commits](tensorflow/tensorflow@v2.0.1...v2.0.3)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

machine-learning/image-classifier/requirements.txt

@@ -1,4 +1,4 @@
 matplotlib
 numpy
-tensorflow==2.0.1
+tensorflow==2.0.3
 tensorflow_datasets