fix: Python/Automate_Image_Caption/requirements.txt to reduce vulnera…

…bilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-KERAS-6615954

Python/Automate_Image_Caption/requirements.txt

@@ -1,6 +1,6 @@
 h5py==2.10.0
 jupyter==1.0.0
-Keras==2.4.3
+Keras==2.13.1rc0
 Keras-Preprocessing==1.1.2
 matplotlib==3.3.3
 numba==0.52.0