Bumped Whispercpp 1.7.3 that adds WithNoSpeechThreshold #273

Job	Run time
linux-cuda	0s
linux-openvino	0s
linux-vulkan	0s
macos-coreml	0s
windows-cuda	0s
windows-openvino	0s
windows-vulkan	0s
linux / native-build	2m 11s
android / native-build	1m 50s
linux-no-avx / native-build	1m 12s
macos / arm-native-build	2m 46s
macos / intel-native-build	59s
wasm / native-build	1m 1s
windows / arm-native-build	1m 46s
windows / intel-native-build	1m 26s
windows-no-avx / native-build	1m 28s
dotnet-maui-build-and-test / dotnet-maui-build	4m 34s
dotnet-build / dotnet-windows	3m 1s
dotnet-build / dotnet-macos	3m 8s
dotnet-build / dotnet-linux	1m 17s
dotnet-maui-build-and-test / dotnet-maui-test-android	0s
	26m 39s

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