metrics: clarification of output_retries_failed metric (#2755)
metrics: clarification of output_retries_failed metric (#2755)

Signed-off-by: konrad <f7f32712f51e84a50b98f425511def87b4eb1599@alpaka.in>

Co-authored-by: konrad <f7f32712f51e84a50b98f425511def87b4eb1599@alpaka.in>
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