added "id: false" to HABTM join table example

Based on the instructions further down in section 3.3.2.
[ci skip] Correct the explanation of the example for find_or_create_by when used with create_with in ActiveRecord Querying guide
Getting Started Guide: posts_controller -> PostsController [ci skip]
fix .find when inverse is set

.find([1]) should return an Array of entries, even when a invese object is in memory already
changelog entry
Fix small typo in docs
Merge pull request #12362 from arthurnn/inverse_on_find

fix .find when inverse is loaded
Merge pull request #12363 from jbaudanza/doc

Fix small typo in docs
Getting Started Guide: update link_to string argument to use single-quote mark, following document style [ci skip]
Merge pull request #12368 from francisgo/patch-5

Getting Started Guide: update link_to string argument to use single-quote [ci skip]
Merge pull request #12355 from speakingcode/doc-fix

Correct error in ActiveRecord Querying guide [ci skip]
quote `false` reference in querying guide.
[ci skip] Add missing periods and update link name and some wording.
Merge pull request #12357 from JuanitoFatas/AR-basics

[ci skip] Add missing periods in active_record_basics.md.
Merge pull request #12356 from francisgo/patch-3

Getting Started Guide: posts_controller -> PostsController [ci skip]
Merge pull request #12349 from odigity/master

added "id: false" to HABTM join table example [ci skip]