Enhance one tailored verification clause (#655)

Added note about Fault Injection Testing not being considered for higher level integration testing.

Signed-off-by: Philipp Ahmann <2428012+pahmann@users.noreply.github.com>

Author: pahmann

process/process_areas/verification/guidance/verification_guideline.rst

@@ -167,3 +167,4 @@ Tailoring
    - For SW requirement 1046 the software is not a production release, but work for the system integrator or distributor with a production release.
    - For SW requirement 1141, 1143, 1144 the SW only points to AoUs, but will not be executed on the final product environment as part of the project scope.
    - For SW requirement 1142 there will be :need:`wp__verification_platform_int_test` available for re-use, but they are not supposed to deliver full coverage.
+     Fault Injection Testing is not considered for higher level integration testing.