docs: fixed the badge uri of the OpenSSF Scorecard (#3520)

Signed-off-by: Gaius <[email protected]>

README.md

@@ -13,7 +13,7 @@
 [![Twitter](https://img.shields.io/twitter/url?style=social&url=https%3A%2F%2Ftwitter.com%2Fdragonfly_oss)](https://twitter.com/dragonfly_oss)
 [![GoDoc](https://godoc.org/github.com/dragonflyoss/Dragonfly2?status.svg)](https://godoc.org/github.com/dragonflyoss/Dragonfly2)
 [![OpenSSF Best Practices](https://bestpractices.coreinfrastructure.org/projects/7103/badge)](https://bestpractices.coreinfrastructure.org/projects/7103)
-[![OpenSSF Scorecard](https://api.scorecard.dev/projects/github.com/dragonflyoss/dragonfly2/badge)](https://scorecard.dev/viewer/?uri=github.com/dragonflyoss/dragonfly2)
+[![OpenSSF Scorecard](https://api.scorecard.dev/projects/github.com/dragonflyoss/Dragonfly2/badge)](https://scorecard.dev/viewer/?uri=github.com/dragonflyoss/Dragonfly2)
 [![LICENSE](https://img.shields.io/github/license/dragonflyoss/Dragonfly2.svg?style=flat-square)](https://github.com/dragonflyoss/Dragonfly2/blob/main/LICENSE)
 
 Provide efficient, stable and secure file distribution and image acceleration