Update Carla 0.9.13 to Carla 0.9.15

[MihirGore23]

I found out there are no changes to be made in software, just in the documentation and the associated links. I have made the necessary changes .

[sergiopaniego]

Thank you for opening the PR.
Could you share a video of Behavior Metrics running using CARLA 0.9.15? How have you installed CARLA? From the source or the package? It seems like the package download retrieves an error: carla-simulator/carla#7017
Have you experimented with this issue? @MihirGore23

[MihirGore23]

I initially tried installing from debian package, but experienced the above error of server timeout. I performed the installation by github package method, then the simulator was running correctly, as 0.9.13 and 0.9.15 have no version incompatiblities of dependancies.

[sergiopaniego]

Thanks for sharing your experience @MihirGore23
In this case, we should also update the instructions with the installation from the source due to this persisting problem.
Could you update it?

[MihirGore23]

I have added a comment stating 'Currently the Carla server has been down.Therefore, it is advisable to install Carla using the GitHub package method instead of the Debian package method.' Kindly review

[sergiopaniego]

Thank you for your contribution! I've merged the PR!
We can move to other possible contributions now! 😄 @MihirGore23