add OpenSSF badge

README.md

@@ -11,6 +11,7 @@
   <a href="https://app.codacy.com/gh/osiegmar/FastCSV/dashboard?utm_source=gh&utm_medium=referral&utm_content=&utm_campaign=Badge_grade"><img src="https://app.codacy.com/project/badge/Grade/7270301676d6463bad9dd1fe23429942" alt="Codacy Badge"></a>
   <a href="https://codecov.io/gh/osiegmar/FastCSV"><img src="https://codecov.io/gh/osiegmar/FastCSV/branch/main/graph/badge.svg?token=WIWkv7HUyk" alt="codecov"></a>
   <a href="https://bugs.chromium.org/p/oss-fuzz/issues/list?sort=-opened&can=1&q=proj:fastcsv"><img src="https://oss-fuzz-build-logs.storage.googleapis.com/badges/fastcsv.svg" alt="oss-fuzz"></a>
+  <a href="https://www.bestpractices.dev/projects/9141"><img src="https://www.bestpractices.dev/projects/9141/badge" alt="OpenSSF"></a>
   <a href="https://javadoc.io/doc/de.siegmar/fastcsv"><img src="https://javadoc.io/badge2/de.siegmar/fastcsv/javadoc.svg" alt="javadoc"></a>
   <a href="https://central.sonatype.com/artifact/de.siegmar/fastcsv"><img src="https://img.shields.io/maven-central/v/de.siegmar/fastcsv" alt="Maven Central"></a>
 </p>