docs: update badge of our own README to the new viewer

Signed-off-by: Diogo Teles Sant'Anna <diogoteles@google.com>

README.md

@@ -1,6 +1,6 @@
 # OpenSSF Scorecard
 
-[![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/ossf/scorecard/badge)](https://api.securityscorecards.dev/projects/github.com/ossf/scorecard)
+[![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/ossf/scorecard/badge)](https://securityscorecards.dev/viewer/?uri=github.com/ossf/scorecard)
 [![OpenSSF Best Practices](https://bestpractices.coreinfrastructure.org/projects/5621/badge)](https://bestpractices.coreinfrastructure.org/projects/5621)
 ![build](https://github.com/ossf/scorecard/workflows/build/badge.svg?branch=main)
 ![CodeQL](https://github.com/ossf/scorecard/workflows/CodeQL/badge.svg?branch=main)