Update lint_configuration.md

Author: Centri3

book/src/lint_configuration.md

@@ -12,6 +12,7 @@ Please use that command to update the file and do not edit it by hand.
 | [avoid-breaking-exported-api](#avoid-breaking-exported-api) | `true` |
 | [msrv](#msrv) | `None` |
 | [cognitive-complexity-threshold](#cognitive-complexity-threshold) | `25` |
+| [excessive-nesting-threshold](#excessive-nesting-threshold) | `10` |
 | [disallowed-names](#disallowed-names) | `["foo", "baz", "quux"]` |
 | [doc-valid-idents](#doc-valid-idents) | `["KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "DirectX", "ECMAScript", "GPLv2", "GPLv3", "GitHub", "GitLab", "IPv4", "IPv6", "ClojureScript", "CoffeeScript", "JavaScript", "PureScript", "TypeScript", "NaN", "NaNs", "OAuth", "GraphQL", "OCaml", "OpenGL", "OpenMP", "OpenSSH", "OpenSSL", "OpenStreetMap", "OpenDNS", "WebGL", "TensorFlow", "TrueType", "iOS", "macOS", "FreeBSD", "TeX", "LaTeX", "BibTeX", "BibLaTeX", "MinGW", "CamelCase"]` |
 | [too-many-arguments-threshold](#too-many-arguments-threshold) | `7` |
@@ -193,6 +194,14 @@ The maximum cognitive complexity a function can have
 * [cognitive_complexity](https://rust-lang.github.io/rust-clippy/master/index.html#cognitive_complexity)
 
 
+### excessive-nesting-threshold
+The maximum amount of nesting a block can reside in
+
+**Default Value:** `10` (`u64`)
+
+* [excessive_nesting](https://rust-lang.github.io/rust-clippy/master/index.html#excessive_nesting)
+
+
 ### disallowed-names
 The list of disallowed names to lint about. NB: `bar` is not here since it has legitimate uses. The value
 `".."` can be used as part of the list to indicate, that the configured values should be appended to the