[ARROW-14365] [R] Update README example to reflect new capabilities

• Type: Improvement
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 6.0.1, 7.0.0
• Component/s: R
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/29933
• Assignee: Nicola Crane
• Reporter: Ian Cook
• Created: 18/Oct/21 15:37
• Updated: 11/Jan/23 08:39
• Resolved: 03/Nov/21 21:05

Description

Now that we can use aggregate functions as well as joins we should update the examples in readme.md to include those functionalities.

Issue Links

• links to: GitHub Pull Request #11576