Add a type template parameter to `AudioDelayFeedback` #709

Job	Run time
debounce	1s
arduino:avr:uno	2m 6s
arduino:avr:mega	2m 17s
esp8266:esp8266:huzzah	18m 47s
STMicroelectronics:stm32:GenF1:pnum=BLUEPILL_F103C8	14m 44s
arduino:mbed_giga:giga	26m 22s
arduino:samd:adafruit_circuitplayground_m0	4m 11s
rp2040:rp2040:rpipico	13m 5s
arduino:renesas_uno:minima	12m 5s
teensy:avr:teensy36	9m 34s
teensy:avr:teensy41	9m 3s
report	20s
	1h 52m 35s

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