Add oneMATH OpenSSF Scorecard badge

[vmalia]

Description

Implementation for uxlfoundation/open-source-working-group#107

Changes

Add OpenSSF Scorecard and result to the README.

Preview:

[sknepper]

This is awesome, thanks @vmalia !
I noticed in oneDNN after their transition to uxlfoundation that their OpenSSF Scorecard location was updated: https://securityscorecards.dev/viewer/?uri=github.com/uxlfoundation/oneDNN

Probably we want to obtain and use a similar one for oneMath. Currently this seems to still be using the github.com/oneapi-src/oneMKL URL.

[vmalia]

This is awesome, thanks @vmalia ! I noticed in oneDNN after their transition to uxlfoundation that their OpenSSF Scorecard location was updated: https://securityscorecards.dev/viewer/?uri=github.com/uxlfoundation/oneDNN

Probably we want to obtain and use a similar one for oneMath. Currently this seems to still be using the github.com/oneapi-src/oneMKL URL.

Yeah I noticed that too, but did not know we had a new UXL URL available.
@itopinsk do you know how to make this change request?