docs: fix indentation causing build error

Release notes file for RD-INFRA-2024.04.17 had incorrect identation for
the bullet list. Fixing the compilation error so the html rendering is
correct.

Signed-off-by: Nuno Lopes <nuno.lopes@arm.com>
Change-Id: I2c55016d7c02ce7788d6b773c12b3c0522147aca