fix typo (#242)

Signed-off-by: Jordan Dubrick <[email protected]>

Author: Jdubrick

oci-registry/build-multi-arch.sh

@@ -76,6 +76,6 @@ else
 
   # Push and delete local manifest
   docker manifest push "$DEFAULT_MANIFEST"
-  docker manifest rm "$$DEFAULT_MANIFEST"
+  docker manifest rm "$DEFAULT_MANIFEST"
 
 fi