Update README.md for failing unit test badge

[FrancescaSchiav]

Summary

Quick fix for #783

Details and comments

Badge link below was wrong

and was replaced by:

[CLAassistant]

All committers have signed the CLA.

[woodsp-ibm]

I must admit that I noticed this the other week, but it looked just like the other application repos we have and they were all indicating passing ok. But I see nature is failing nightly CI and it still shows tests are passing - so maybe the other repos were all "stuck" showing passing and here it was stuck showing failed. Using the same format on nature returns failing at present - which should be the true status there. The way it was done I recall it working - but it seems that's the case no longer.

[coveralls]

Pull Request Test Coverage Report for Build 8099765037

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.636%

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Totals
Change from base Build 8099316240:	0.0%
Covered Lines:	1887
Relevant Lines:	2037

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💛 - Coveralls

[OkuyanBoga]

I must admit that I noticed this the other week, but it looked just like the other application repos we have and they were all indicating passing ok. But I see nature is failing nightly CI and it still shows tests are passing - so maybe the other repos were all "stuck" showing passing and here it was stuck showing failed. Using the same format on nature returns failing at present - which should be the true status there. The way it was done I recall it working - but it seems that's the case no longer.

Is this something automated? Because when I check the settings of the Github Actions/Machine Learning Unit Tests, it only allows you to copy the current status, and we thought it needs to be changed in the README.md manually by simply pasting the link.

[woodsp-ibm]

Is this something automated?

The link is supposed to reflect what the state is for rendering as a status badge. Take the release there in that ribbon bar you see, thats updated, the coverage etc. So its automated in that sense yes. You can copy the url into the browser and see the image, change it to nature and you will see it shows CI failing (the readme there is like it is here - before this PR changes it)