add missing MSRV configuration information for manual_div_ceil

Author: lapla-cogito

book/src/lint_configuration.md

@@ -764,6 +764,7 @@ The minimum rust version that the project supports. Defaults to the `rust-versio
 * [`manual_bits`](https://rust-lang.github.io/rust-clippy/master/index.html#manual_bits)
 * [`manual_c_str_literals`](https://rust-lang.github.io/rust-clippy/master/index.html#manual_c_str_literals)
 * [`manual_clamp`](https://rust-lang.github.io/rust-clippy/master/index.html#manual_clamp)
+* [`manual_div_ceil`](https://rust-lang.github.io/rust-clippy/master/index.html#manual_div_ceil)
 * [`manual_flatten`](https://rust-lang.github.io/rust-clippy/master/index.html#manual_flatten)
 * [`manual_hash_one`](https://rust-lang.github.io/rust-clippy/master/index.html#manual_hash_one)
 * [`manual_is_ascii_check`](https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_ascii_check)

clippy_config/src/conf.rs

@@ -619,6 +619,7 @@ define_Conf! {
         manual_bits,
         manual_c_str_literals,
         manual_clamp,
+        manual_div_ceil,
         manual_flatten,
         manual_hash_one,
         manual_is_ascii_check,