arrow

ARROW-16375: [R][CI] Pin test-r-devdocs on Windows to R 4.1

Closes #13011 from thisisnic/ARROW-16375_pin_build_4.1

Lead-authored-by: Nic Crane <thisisnic@gmail.com>
Co-authored-by: Nicola Crane <thisisnic@gmail.com>
Signed-off-by: Nic Crane <thisisnic@gmail.com>