Fix snapshot badges

Author: ben221199

README.md

@@ -4,8 +4,8 @@ JavaCV
 [![Gitter](https://badges.gitter.im/bytedeco/javacv.svg)](https://gitter.im/bytedeco/javacv)
 ![Maven Central Version](https://img.shields.io/maven-central/v/org.bytedeco/javacv?label=maven-central%20%28jacacv%29)
 ![Maven Central Version](https://img.shields.io/maven-central/v/org.bytedeco/javacv-platform?label=maven-central%20%28jacacv-platform%29)
-![Sonatype Nexus (Snapshots)](https://img.shields.io/nexus/s/org.bytedeco/javacv?server=https%3A%2F%2Foss.sonatype.org&label=nexus%20%28jacacv%29)
-![Sonatype Nexus (Snapshots)](https://img.shields.io/nexus/s/org.bytedeco/javacv-platform?server=https%3A%2F%2Foss.sonatype.org&label=nexus%20%28jacacv-platform%29)
+![Maven Central Version (Snapshots)](https://img.shields.io/maven-metadata/v?metadataUrl=https%3A%2F%2Fcentral.sonatype.com%2Frepository%2Fmaven-snapshots%2Forg%2Fbytedeco%2Fjavacv%2Fmaven-metadata.xml&label=maven-central-snapshot%20%28jacacv%29)
+![Maven Central Version (Snapshots)](https://img.shields.io/maven-metadata/v?metadataUrl=https%3A%2F%2Fcentral.sonatype.com%2Frepository%2Fmaven-snapshots%2Forg%2Fbytedeco%2Fjavacv-platform%2Fmaven-metadata.xml&label=maven-central-snapshot%20%28jacacv-platform%29)
 <sup>Commercial support:</sup> [![xscode](https://img.shields.io/badge/Available%20on-xs%3Acode-blue?style=?style=plastic&logo=appveyor&logo=data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAMAAACdt4HsAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAAZQTFRF////////VXz1bAAAAAJ0Uk5T/wDltzBKAAAAlUlEQVR42uzXSwqAMAwE0Mn9L+3Ggtgkk35QwcnSJo9S+yGwM9DCooCbgn4YrJ4CIPUcQF7/XSBbx2TEz4sAZ2q1RAECBAiYBlCtvwN+KiYAlG7UDGj59MViT9hOwEqAhYCtAsUZvL6I6W8c2wcbd+LIWSCHSTeSAAECngN4xxIDSK9f4B9t377Wd7H5Nt7/Xz8eAgwAvesLRjYYPuUAAAAASUVORK5CYII=)](https://xscode.com/bytedeco/javacv)
 
 Introduction