com.unity.xr.arcore 5.1.2 Package Notes

Changed the image tracking documentation to reference the newly updated [Use reference image libraries with AssetBundles](xref:arfoundation-image-tracking#use-reference-image-libraries-with-assetbundles) manual in AR Foundation.
Changed the project validation rules to remove a warning if this plug-in was not enabled for the Android build target. There are legitimate reasons to build for Android without enabling the ARCore plug-in, so this warning was not helpful.
Changed AR Foundation dependency version to 5.1.2.

Fixed issue ARFB-322 where an image library that had an image(s) score too low with the arcoreimg tool, or fail to score at all, would cause a crash at runtime.

com.unity.xr.arcore 5.1.2