chore(ci): use check-external-types separate config file

.github/workflows/CI.yml

@@ -250,7 +250,7 @@ jobs:
       - uses: Swatinem/rust-cache@v2
 
       - name: check-external-types
-        run: cargo check-external-types
+        run: cargo check-external-types --config .github/workflows/external-types.toml
 
   udeps:
     needs: [style]

.github/workflows/external-types.toml

@@ -0,0 +1,15 @@
+allowed_external_types = [
+    "bytes::buf::buf_impl::Buf",
+    "bytes::bytes::Bytes",
+    "http::header",
+    "http::header::map::HeaderMap",
+    "http::method::Method",
+    "http::request::Request",
+    "http::response::Response",
+    "http::status::StatusCode",
+    "http::uri::Uri",
+    "http::version::Version",
+    "http_body::Body",
+    "http_body::frame::Frame",
+    "http_body::size_hint::SizeHint",
+]

Cargo.toml

@@ -97,23 +97,6 @@ rustdoc-args = ["--cfg", "docsrs", "--cfg", "hyper_unstable_ffi", "--cfg", "hype
 [package.metadata.playground]
 features = ["full"]
 
-[package.metadata.cargo_check_external_types]
-allowed_external_types = [
-    "bytes::buf::buf_impl::Buf",
-    "bytes::bytes::Bytes",
-    "http::header",
-    "http::header::map::HeaderMap",
-    "http::method::Method",
-    "http::request::Request",
-    "http::response::Response",
-    "http::status::StatusCode",
-    "http::uri::Uri",
-    "http::version::Version",
-    "http_body::Body",
-    "http_body::frame::Frame",
-    "http_body::size_hint::SizeHint",
-]
-
 [profile.release]
 codegen-units = 1
 incremental = false