docs: link to Scorecard report viewer (#2510)

Much nicer to look at than a wall of JSON

README.md

@@ -1,4 +1,4 @@
-[![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/google/osv.dev/badge)](https://api.securityscorecards.dev/projects/github.com/google/osv.dev)
+[![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/google/osv.dev/badge)](https://scorecard.dev/viewer/?uri=github.com/google/osv.dev)
 
 ## Documentation
 
@@ -65,4 +65,4 @@ to determine suitability for your use. Some popular third party tools are:
 - [OSS Review Toolkit](https://github.com/oss-review-toolkit/ort)
 - [pip-audit](https://github.com/pypa/pip-audit)
 - [Renovate](https://github.com/renovatebot/renovate)
-- [Trivy](https://github.com/aquasecurity/trivy)
+- [Trivy](https://github.com/aquasecurity/trivy)