Fixed typo in the article "2.6.1.4 Building and Creating Associated Objects"

XL_08012025 Fixed a little typo in the article "2.6.1.4 Building and Creating Associated Objects"

Was missed a mark "!"

Changed with tips of reviewer

Author: VitaliiShevchenko

guides/source/association_basics.md

@@ -1395,8 +1395,8 @@ specified on the associated model, the associated object _will_ be saved.
 @assembly = @part.assemblies.create({ assembly_name: "Transmission housing" })
 ```
 
-Does the same as `collection.create`, but raises `ActiveRecord::RecordInvalid`
-if the record is invalid.
+`collection.create!` does the same as `collection.create`, but raises
+`ActiveRecord::RecordInvalid` if the record is invalid.
 
 The [`collection.reload`][] method returns a Relation of all of the associated
 objects, forcing a database read. If there are no associated objects, it returns