Bump tensorflow in /machine-learning/nlp/text-classification

Bumps [tensorflow](https://github.com/tensorflow/tensorflow) from 2.0.0 to 2.5.3.
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Changelog](https://github.com/tensorflow/tensorflow/blob/master/RELEASE.md)
- [Commits](tensorflow/tensorflow@v2.0.0...v2.5.3)

---
updated-dependencies:
- dependency-name: tensorflow
  dependency-type: direct:production
...

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Author: dependabot[bot]

machine-learning/nlp/text-classification/requirements.txt

@@ -1,4 +1,4 @@
 tqdm
 numpy
-tensorflow==2.0.0
+tensorflow==2.5.3
 sklearn