Update README.md - OpenSSF Best practices badge (#230)

Signed-off-by: Mathieu Benoit <[email protected]>

README.md

@@ -1,4 +1,4 @@
-[![ci](https://github.com/score-spec/score-compose/actions/workflows/ci.yaml/badge.svg)](https://github.com/score-spec/score-compose/actions/workflows/ci.yaml) [![release](https://github.com/score-spec/score-compose/actions/workflows/release.yaml/badge.svg)](https://github.com/score-spec/score-compose/actions/workflows/release.yaml) [![good first issues](https://img.shields.io/github/issues-search/score-spec/score-compose?query=type%3Aissue%20is%3Aopen%20label%3A%22good%20first%20issue%22&label=good%20first%20issues&style=flat&logo=github)](https://github.com/score-spec/score-compose/issues?q=is%3Aissue+is%3Aopen+label%3A%22good+first+issue%22)
+[![ci](https://github.com/score-spec/score-compose/actions/workflows/ci.yaml/badge.svg)](https://github.com/score-spec/score-compose/actions/workflows/ci.yaml) [![release](https://github.com/score-spec/score-compose/actions/workflows/release.yaml/badge.svg)](https://github.com/score-spec/score-compose/actions/workflows/release.yaml) [![good first issues](https://img.shields.io/github/issues-search/score-spec/score-compose?query=type%3Aissue%20is%3Aopen%20label%3A%22good%20first%20issue%22&label=good%20first%20issues&style=flat&logo=github)](https://github.com/score-spec/score-compose/issues?q=is%3Aissue+is%3Aopen+label%3A%22good+first+issue%22) [![OpenSSF Best Practices](https://www.bestpractices.dev/projects/9900/badge)](https://www.bestpractices.dev/projects/9900)
 
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