Update mdbook

Author: ehuss

Cargo.lock

@@ -3103,9 +3103,9 @@ dependencies = [
 
 [[package]]
 name = "mdbook"
-version = "0.4.25"
+version = "0.4.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d1ed28d5903dde77bd5182645078a37ee57014cac6ccb2d54e1d6496386648e4"
+checksum = "764dcbfc2e5f868bc1b566eb179dff1a06458fd0cff846aae2579392dd3f01a0"
 dependencies = [
  "ammonia",
  "anyhow",

src/tools/rustbook/Cargo.toml

@@ -9,6 +9,6 @@ clap = "4.0.32"
 env_logger = "0.7.1"
 
 [dependencies.mdbook]
-version = "0.4.25"
+version = "0.4.28"
 default-features = false
 features = ["search"]