Update documentation for ActiveRecord persistence methods that accept +returning+ option to note that this is available for SQLite3 adapter as well

Co-authored-by: OuYangJinTing <[email protected]>

Author: fractaledmind

activerecord/lib/active_record/persistence.rb

@@ -115,7 +115,7 @@ def insert(attributes, returning: nil, unique_by: nil, record_timestamps: nil)
       # ==== Options
       #
       # [:returning]
-      #   (PostgreSQL and MariaDB only) An array of attributes to return for all successfully
+      #   (PostgreSQL, SQLite3, and MariaDB only) An array of attributes to return for all successfully
       #   inserted records, which by default is the primary key.
       #   Pass <tt>returning: %w[ id name ]</tt> for both id and name
       #   or <tt>returning: false</tt> to omit the underlying <tt>RETURNING</tt> SQL
@@ -205,7 +205,7 @@ def insert!(attributes, returning: nil, record_timestamps: nil)
       # ==== Options
       #
       # [:returning]
-      #   (PostgreSQL and MariaDB only) An array of attributes to return for all successfully
+      #   (PostgreSQL, SQLite3, and MariaDB only) An array of attributes to return for all successfully
       #   inserted records, which by default is the primary key.
       #   Pass <tt>returning: %w[ id name ]</tt> for both id and name
       #   or <tt>returning: false</tt> to omit the underlying <tt>RETURNING</tt> SQL
@@ -271,7 +271,7 @@ def upsert(attributes, **kwargs)
       # ==== Options
       #
       # [:returning]
-      #   (PostgreSQL and MariaDB only) An array of attributes to return for all successfully
+      #   (PostgreSQL, SQLite3, and MariaDB only) An array of attributes to return for all successfully
       #   inserted records, which by default is the primary key.
       #   Pass <tt>returning: %w[ id name ]</tt> for both id and name
       #   or <tt>returning: false</tt> to omit the underlying <tt>RETURNING</tt> SQL