change: `VoiceModel` → `VoiceModelFile` #985

Job	Run time
rust-lint	3m 51s
c-header	45s
actionlint	20s
rust-integration-test-strategy-matrix	1s
rust-unit-test	4m 10s
validate-cargo-lock	22s
shellcheck	15s
build-and-test-java-api (windows-latest)	6m 59s
build-and-test-python-api (windows-latest)	7m 11s
build-and-test-java-api (macos-latest)	2m 38s
build-and-test-python-api (macos-latest)	3m 24s
build-and-test-java-api (ubuntu-latest)	3m 4s
build-and-test-python-api (ubuntu-latest)	3m 6s
build-unix-cpp-example (macos-latest, osx-x64-cpu-cpp-shared)	1m 33s
build-windows-cpp-example	3m 24s
build-unix-cpp-example (ubuntu-latest, linux-x64-cpu-cpp-shared)	1m 41s
rust-integration-test (macos-12)	2m 41s
rust-integration-test (ubuntu-20.04)	1m 31s
	46m 56s

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