Rollup merge of rust-lang#109669 - rustbot:docs-update, r=ehuss

Update books

## rust-lang/nomicon

1 commits in 1f3e4cd4fd88b5b5d45feb86a11b6d2f93e5a974..b5f7500fc40775096c2bbd204eae096612cf9047
2023-03-27 13:47:36 UTC to 2023-03-27 13:47:36 UTC

- Fix typo in 3.8 Subtyping and Variance (rust-lang/nomicon#395)

## rust-lang/reference

4 commits in 24c87f6663aed55b05d2cc286878f28f21918825..3c47807a3131b3c7cacb508f52632078d253cd0a
2023-03-26 18:42:43 UTC to 2023-03-14 18:28:23 UTC

- Relax ordering rules for `asm!` operands (rust-lang/reference#1323)
- Improve labeled blocks documentation (rust-lang/reference#1342)
- Inline assembly: Fix repeated and unordered items in guaranteed directives (rust-lang/reference#1341)
- Clarify that free constants are always evaluated at compile time (rust-lang/reference#1328)

## rust-lang/rust-by-example

7 commits in af0998b7473839ca75563ba3d3e7fd0160bef235..cfbfd648ce33926c3490f24de9a5b56cce404b88
2023-03-21 12:05:17 UTC to 2023-03-21 11:58:20 UTC

- Fix two typos in the asm chapter (rust-lang/rust-by-example#1692)
- Change `runtime` error to `compile time` error (rust-lang/rust-by-example#1690)
- Fix tests running on non-x86 platforms. (rust-lang/rust-by-example#1687)
- Remove trailing semicolon from macro expression (rust-lang/rust-by-example#1683)
- Explained why it should not work in Chapter 4.1 (rust-lang/rust-by-example#1682)
- Fix comment to mention the correct type of error (rust-lang/rust-by-example#1680)
- Improve the content for `read_lines` (rust-lang/rust-by-example#1679)

## rust-lang/rustc-dev-guide

9 commits in b1b6d693cd1461e53de4132c1b183ace31cd36e5..d08baa166b463537229eeb737c4ccadabd83cf78
2023-03-26 17:55:53 UTC to 2023-03-14 03:50:20 UTC

- Add locale_resources (rust-lang/rustc-dev-guide#1651)
- Don't require $GITHUB_TOKEN to build locally (rust-lang/rustc-dev-guide#1652)
- bootsrapping stages overview list (rust-lang/rustc-dev-guide#1555)
- Update labels overview (rust-lang/rustc-dev-guide#1639)
- first mention of type, and add a link (rust-lang/rustc-dev-guide#1643)
- Add SIP solution for macOS users (rust-lang/rustc-dev-guide#1636)
- Add chapter on fuzzing (rust-lang/rustc-dev-guide#1646)
- Fix "Crate disambiguator" in libs-and-metadata.md (rust-lang/rustc-dev-guide#1648)
- Update rustdoc-internals.md (rust-lang/rustc-dev-guide#1644)