fix(snap): Fix snap being built on unsupported architectures

Signed-off-by: 林博仁(Buo-ren Lin) <buo.ren.lin@gmail.com>

Author: brlin-tw

snap/snapcraft.yaml

@@ -80,6 +80,14 @@ confinement: strict
 # snaps can be promoted to `candidate` and `stable` channels
 grade: stable
 
+# Supported architectures
+# https://documentation.ubuntu.com/snapcraft/stable/reference/project-file/snapcraft-yaml/#architectures
+platforms:
+  amd64:
+  arm64:
+  armhf:
+  riscv64:
+
 # Run `snapcraft help sources` for supported keywords on pulling a part's
 # source ingredients
 # Run `snapcraft plugins` for supported build helper plugins