readme: archive repository rustsbi/arceboot

Author: luojia65

README.md

@@ -1,3 +1,9 @@
+# Repository archived
+
+This crate has been moved to repository [rustsbi/rustsbi](https://github.com/rustsbi/rustsbi). Please direct issues and pull requests to the new repository.
+
+---
+
 # ArceBoot
 Reuse [ArceOS](https://github.com/arceos-org/arceos) components to build a cross-platform operating system bootloader
 
@@ -13,4 +19,4 @@ $ make qemu-run
 # such as x11 forwarding configured on your host machine.
 $ make EXACT_FEATURES="display"
 $ make qemu-display
-```
+```