Update TOML website links.

src/doc/src/faq.md

@@ -147,7 +147,7 @@ similar configuration files in directory listings. Sorting files often puts
 capital letters before lowercase letters, ensuring files like `Makefile` and
 `Cargo.toml` are placed together. The trailing `.toml` was chosen to emphasize
 the fact that the file is in the [TOML configuration
-format](https://github.com/toml-lang/toml).
+format](https://toml.io/).
 
 Cargo does not allow other names such as `cargo.toml` or `Cargofile` to
 emphasize the ease of how a Cargo repository can be identified. An option of

src/doc/src/guide/creating-a-new-project.md

@@ -37,7 +37,8 @@ edition = "2018"
 ```
 
 This is called a **manifest**, and it contains all of the metadata that Cargo
-needs to compile your package.
+needs to compile your package. This file is written in the [TOML] format
+(pronounced /tɑməl/).
 
 Here’s what’s in `src/main.rs`:
 
@@ -89,3 +90,5 @@ $ cargo build --release
 Compiling in debug mode is the default for development. Compilation time is
 shorter since the compiler doesn't do optimizations, but the code will run
 slower. Release mode takes longer to compile, but the code will run faster.
+
+[TOML]: https://toml.io/

src/doc/src/reference/cargo-targets.md

@@ -160,7 +160,7 @@ Similarly to tests:
 All of the  `[lib]`, `[[bin]]`, `[[example]]`, `[[test]]`, and `[[bench]]`
 sections in `Cargo.toml` support similar configuration for specifying how a
 target should be built. The double-bracket sections like `[[bin]]` are
-array-of-table of [TOML](https://github.com/toml-lang/toml#array-of-tables),
+[array-of-table of TOML](https://toml.io/en/v1.0.0-rc.3#array-of-tables),
 which means you can write more than one `[[bin]]` section to make several
 executables in your crate. You can only specify one library, so `[lib]` is a
 normal TOML table.

src/doc/src/reference/config.md

@@ -937,7 +937,7 @@ Sets the width for progress bar.
 [build scripts]: build-scripts.md
 [`-C linker`]: ../../rustc/codegen-options/index.md#linker
 [override a build script]: build-scripts.md#overriding-build-scripts
-[toml]: https://github.com/toml-lang/toml
+[toml]: https://toml.io/
 [incremental compilation]: profiles.md#incremental
 [profile]: profiles.md
 [libcurl format]: https://ec.haxx.se/usingcurl-proxies.html

src/doc/src/reference/manifest.md

@@ -1,7 +1,7 @@
 ## The Manifest Format
 
-The `Cargo.toml` file for each package is called its *manifest*. Every manifest
-file consists of the following sections:
+The `Cargo.toml` file for each package is called its *manifest*. It is written
+in the [TOML] format. Every manifest file consists of the following sections:
 
 * [`cargo-features`](unstable.md) — Unstable, nightly-only features.
 * [`[package]`](#the-package-section) — Defines a package.
@@ -516,6 +516,7 @@ more detail.
 [spdx-2.1-license-expressions]: https://spdx.org/spdx-specification-21-web-version#h.jxpfx0ykyb60
 [spdx-license-list-3.6]: https://github.com/spdx/license-list-data/tree/v3.6
 [SPDX site]: https://spdx.org/license-list
+[TOML]: https://toml.io/
 
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