Update dependent numpy version from 1.21.4 -> 1.26.4

[Shubham11Gupta]

Numpy version 1.21.4 is giving out medium level vulnerabilities while the whitesource testing.
In my code i am using opencv-python-headless:4.9.0.80 as i only need it in the backend code. and this is giving out the vulnerability during the github whitesource testing.
Can we get it working with the latest LTS version i.e. 1.26.4.