Rollup merge of #123039 - rustbot:docs-update, r=ehuss

Update books

## rust-lang/edition-guide

1 commits in e1eead1181a691e56299294d5f1d62fe7a26d317..98b33e9a441457b0a491fe1be90e7de64eafc3e5
2024-03-23 14:17:26 UTC to 2024-03-23 14:17:26 UTC

- remove indication that C string literals don't exist yet (rust-lang/edition-guide#295)

## rust-lang/reference

4 commits in 5afb503a4c1ea3c84370f8f4c08a1cddd1cdf6ad..984b36eca4b9293df04d5ba4eb5c4f77db0f51dc
2024-03-25 14:05:19 UTC to 2024-03-19 20:01:14 UTC

- Fix typo of shebang (rust-lang/reference#1486)
- Document importing `main` (rust-lang/reference#1461)
- add grammar for `associated_type_bounds` in reference (rust-lang/reference#1481)
- Literal expressions: fix mistake in the definition of unicode escapes (rust-lang/reference#1483)

## rust-lang/rust-by-example

1 commits in e093099709456e6fd74fecd2505fdf49a2471c10..7601e0c5ad29d5bd3b518700ea63fddfff5915a7
2024-03-17 21:37:25 UTC to 2024-03-17 21:37:25 UTC

- Update enum_use.md to use a more neutral theme (rust-lang/rust-by-example#1828)

## rust-lang/rustc-dev-guide

12 commits in 8a5d647f19b08998612146b1cb2ca47083db63e0..ffa246b7fd95a96e1cd54883e613aed42c32547d
2024-03-23 07:44:42 UTC to 2024-03-11 18:17:28 UTC

- [MCP 723] Rename AstConv to HIR ty lowering (rust-lang/rustc-dev-guide#1916)
- add chapter to summary (rust-lang/rustc-dev-guide#1947)
- document difference between solvers + new solver normalization (rust-lang/rustc-dev-guide#1945)
- Fix broken link in chapter '1. How to build and run the compiler' (rust-lang/rustc-dev-guide#1946)
- typo (rust-lang/rustc-dev-guide#1944)
- Reflect rustc_codegen_cranelift move (rust-lang/rustc-dev-guide#1941)
- Update rustdoc-internals.md (rust-lang/rustc-dev-guide#1911)
- Update test-implementation.md (rust-lang/rustc-dev-guide#1937)
- Extract Bootstrap into its own section (rust-lang/rustc-dev-guide#1939)
- typos (rust-lang/rustc-dev-guide#1938)
- More updates for recent diagnostics changes. (rust-lang/rustc-dev-guide#1936)
- Update bibliography.md (rust-lang/rustc-dev-guide#1912)