Bumped Whispercpp 1.7.3 that adds WithNoSpeechThreshold #256

Job	Run time
linux-cuda	0s
linux-vulkan	0s
linux-openvino	0s
macos-coreml	0s
windows-cuda	0s
windows-openvino	0s
windows-vulkan	0s
linux-no-avx / native-build	1m 10s
android / native-build	1m 41s
linux / native-build	2m 48s
macos / arm-native-build	2m 28s
macos / intel-native-build	59s
wasm / native-build	58s
windows / arm-native-build	1m 46s
windows-no-avx / native-build	2m 23s
windows / intel-native-build	1m 41s
dotnet-build / dotnet-windows	2m 57s
dotnet-build / dotnet-macos	47s
dotnet-build / dotnet-linux	38s
dotnet-maui-build-and-test / dotnet-maui-build	4m 36s
dotnet-maui-build-and-test / dotnet-maui-test-android	1m 59s
	26m 51s

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