Add a Linux arm64 case for coursier download

Author: Gedochao

Diff for: project/settings.sc

@@ -79,6 +79,12 @@ def cs: T[String] = T.persistent {
             s"https://github.com/coursier/coursier/releases/download/v$csVersion/cs-x86_64-pc-linux.gz"
           )
         else None
+      case "arm64" =>
+        if (Properties.isLinux)
+          Some(
+            s"https://github.com/VirtusLab/coursier-m1/releases/download/v$csVersion/cs-aarch64-pc-linux.gz"
+          )
+        else None
       case "aarch64" =>
         if (Properties.isLinux)
           Some(