ci: run ci on every branch

CI is the easiest way to test multiplatform support
at this stage.

Author: josibake

.github/workflows/ci.yml

@@ -2,7 +2,7 @@ name: test rust-bitcoinkernel devshell
 
 on:
   push:
-    branches: [setup-ci]
+    branches: ["*"]
   pull_request:
 
 jobs: