Bump tensorflow from 1.15.2 to 2.11.1 in /Parking Space Detection System

Bumps [tensorflow](https://github.com/tensorflow/tensorflow) from 1.15.2 to 2.11.1.
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Changelog](https://github.com/tensorflow/tensorflow/blob/master/RELEASE.md)
- [Commits](tensorflow/tensorflow@v1.15.2...v2.11.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Parking Space Detection System/requirements.txt

@@ -1,5 +1,5 @@
 scikit-image
-tensorflow==1.15.2
+tensorflow==2.11.1
 keras>=2.0.8
 opencv-python
 matplotlib