fix(snap): publish snap as stable (#958)

.github/workflows/linux.yml

@@ -139,5 +139,5 @@ jobs:
         with:
           store_login: ${{ secrets.SNAP_STORE_LOGIN }}
           snap: ${{ steps.build.outputs.snap }}
-          release: beta
+          release: stable
         if: env.SHOULD_DEPLOY == 'yes'