doc: [profile.*] sections are for root crate only

ie.
warning: profiles for the non root package will be ignored, specify profiles at the workspace root:

diff --git a/src/doc/src/reference/manifest.md b/src/doc/src/reference/manifest.md
index 48372bb223ce66581cb7b6cb64990e80533a6549..d2f3fd2f595c863ecb64ada4632b882a2e5c8c3f 100644 (file)
--- a/src/doc/src/reference/manifest.md
+++ b/src/doc/src/reference/manifest.md
@@ -491,7 +491,8 @@ properties:
 * Whenever any crate in the workspace is compiled, output is placed in the
   *workspace root*. i.e. next to the *root crate*'s `Cargo.toml`.
 * The lock file for all crates in the workspace resides in the *workspace root*.
-* The `[patch]` and `[replace]` sections in `Cargo.toml` are only recognized
+* The `[patch]`, `[replace]` and `[profile.*]` sections in `Cargo.toml`
+  are only recognized
   in the *root crate*'s manifest, and ignored in member crates' manifests.
 
 [RFC 1525]: https://github.com/rust-lang/rfcs/blob/master/text/1525-cargo-workspace.md