Auto merge of #50470 - frewsxcv:frewsxcv-update-books, r=Mark-Simulacrum

Update books for the next release.

Continuation from https://github.com/rust-lang/rust/pull/50427

diff --git a/src/doc/book b/src/doc/book
index 6237a75790cd2e0ca22961b55f64a83319e73464..f51127530d46b9acbf4747c859da185e771cfcf3 160000 (submodule)
--- a/src/doc/book
+++ b/src/doc/book
@@ -1 +1 @@
-Subproject commit 6237a75790cd2e0ca22961b55f64a83319e73464
+Subproject commit f51127530d46b9acbf4747c859da185e771cfcf3

diff --git a/src/doc/nomicon b/src/doc/nomicon
index 3c56329d1bd9038e5341f1962bcd8d043312a712..748a5e6742db4a21c4c630a58087f818828e8a0a 160000 (submodule)
--- a/src/doc/nomicon
+++ b/src/doc/nomicon
@@ -1 +1 @@
-Subproject commit 3c56329d1bd9038e5341f1962bcd8d043312a712
+Subproject commit 748a5e6742db4a21c4c630a58087f818828e8a0a

diff --git a/src/doc/reference b/src/doc/reference
index 76296346e97c3702974d3398fdb94af9e10111a2..134f419ee62714590b04712fe6072253bc2a7822 160000 (submodule)
--- a/src/doc/reference
+++ b/src/doc/reference
@@ -1 +1 @@
-Subproject commit 76296346e97c3702974d3398fdb94af9e10111a2
+Subproject commit 134f419ee62714590b04712fe6072253bc2a7822

diff --git a/src/doc/rust-by-example b/src/doc/rust-by-example
index d5ec87eabe5733cc2348c7dada89fc67c086f391..eebda16e4b45f2eed4310cf7b9872cc752278163 160000 (submodule)
--- a/src/doc/rust-by-example
+++ b/src/doc/rust-by-example
@@ -1 +1 @@
-Subproject commit d5ec87eabe5733cc2348c7dada89fc67c086f391
+Subproject commit eebda16e4b45f2eed4310cf7b9872cc752278163