Explain the new check-cfg lint

app-proto/Cargo.toml

@@ -46,6 +46,10 @@ features = [
 dyna3 = { path = ".", default-features = false, features = ["dev"] }
 wasm-bindgen-test = "0.3.34"
 
+# turn off spurious warnings about the custom config that Sycamore uses
+#
+#   https://sycamore.dev/book/troubleshooting#unexpected-cfg-condition-name--sycamore-force-ssr
+#
 [lints.rust]
 unexpected_cfgs = { level = "warn", check-cfg = ["cfg(sycamore_force_ssr)"] }