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
diff --git a/docs/technical_references/instructions/index.rst b/docs/technical_references/instructions/index.rst
index e9c95a0..6e869ee 100644
--- a/docs/technical_references/instructions/index.rst
+++ b/docs/technical_references/instructions/index.rst
@@ -7,7 +7,7 @@
 
     tfm_build_instruction
     tfm_build_instruction_iar
-    tfm_run_instruction
+    run_tfm_examples_on_arm_platforms
     documentation_generation
 
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