docs: link to the Scorecard Report (#1197)

There's now a nicer UI for the Scorecard Report so link to it instead

README.md

@@ -1,6 +1,6 @@
 # OSV-Scanner
 
-[![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/google/osv-scanner/badge)](https://api.securityscorecards.dev/projects/github.com/google/osv-scanner)
+[![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/google/osv-scanner/badge)](https://scorecard.dev/viewer/?uri=github.com/google/osv-scanner)
 [![Go Report Card](https://goreportcard.com/badge/github.com/google/osv-scanner)](https://goreportcard.com/report/github.com/google/osv-scanner)
 [![codecov](https://codecov.io/gh/google/osv-scanner/graph/badge.svg?token=C8IDVX9LP5)](https://codecov.io/gh/google/osv-scanner)
 [![SLSA 3](https://slsa.dev/images/gh-badge-level3.svg)](https://slsa.dev)