set docker.io domain for default binfmt image

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

action.yml

@@ -9,7 +9,7 @@ branding:
 inputs:
   image:
     description: 'QEMU static binaries Docker image (e.g. tonistiigi/binfmt:latest)'
-    default: 'tonistiigi/binfmt:latest'
+    default: 'docker.io/tonistiigi/binfmt:latest'
     required: false
   platforms:
     description: 'Platforms to install (e.g. arm64,riscv64,arm)'