CI: Fix shebang path of bun

Author: ad-si

Diff for: shebang-scripts/today/bun

@@ -1,3 +1,4 @@
-#! /Users/adrian/.bun/bin/bun
+#! /usr/bin/env bun
+// TODO: Absolute path to bun needs to be the same in CI and local
 
 console.log(new Date().toISOString().slice(0, 10))