add Maven Central badge

hboutemy · web-flow · commit 1b1becd22343 · 2023-05-24T09:32:50.000+02:00
Signed-off-by: Hervé Boutemy &lt;hboutemy@apache.org&gt;
diff --git a/README.md b/README.md
@@ -1,4 +1,5 @@
 # Spdx-Java-Library
+[![Maven Central](https://maven-badges.herokuapp.com/maven-central/org.spdx/java-spdx-library/badge.svg)](https://maven-badges.herokuapp.com/maven-central/org.spdx/java-spdx-library)
 ![Java CI with Maven](https://github.com/spdx/Spdx-Java-Library/workflows/Java%20CI%20with%20Maven/badge.svg)
 
 Java library which implements the Java object model for SPDX and provides useful helper functions.

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,5 @@`
`1`	`1`	`# Spdx-Java-Library`
	`2`	`+[![Maven Central](https://maven-badges.herokuapp.com/maven-central/org.spdx/java-spdx-library/badge.svg)](https://maven-badges.herokuapp.com/maven-central/org.spdx/java-spdx-library)`
`2`	`3`	`![Java CI with Maven](https://github.com/spdx/Spdx-Java-Library/workflows/Java%20CI%20with%20Maven/badge.svg)`
`3`	`4`
`4`	`5`	`Java library which implements the Java object model for SPDX and provides useful helper functions.`