Docs: Refine tfm_run_instruction.rst name

Rename 'tfm_run_instruction.rst' to
'run_tfm_examples_on_arm_platforms.rst' to reflect the content better.

Signed-off-by: Summer Qin <summer.qin@arm.com>
Change-Id: I0ae23907ab05fe08ba191bb123507d53a7af48e1
5 files changed