Change InlineArray sugar separator `x` -> `of` #217

Job	Run time
Run tests using swift-syntax-dev-utils (Linux)	1m 39s
Validate generated code	1m 39s
Run tests using swift-syntax-dev-utils (Windows)	1m 39s
Test / Linux (5.9 - jammy)	1m 37s
Test / Linux (5.10 - jammy)	1m 37s
Test / Linux (6.0 - jammy)	1m 37s
Test / Linux (6.1 - jammy)	1m 39s
Test / Linux (nightly-main - jammy)	1m 39s
Test / Linux (nightly-6.1 - jammy)	1m 37s
Test / Linux (nightly-6.2 - jammy)	1m 38s
Test / macOS (Xcode ${{ matrix.xcode_version }} - ${{ matrix.os_version }} - ${{ matrix.arch }})	0s
Test / Windows (5.9 - windows-2022)	1m 39s
Test / Windows (6.0 - windows-2022)	1m 38s
Test / Windows (6.1 - windows-2022)	1m 36s
Test / Windows (nightly - windows-2019)	1m 44s
Test / Windows (nightly-6.1 - windows-2019)	1m 42s
Soundness / API breakage check	0s
Soundness / Documentation check	1m 36s
Soundness / Unacceptable language check	3s
Soundness / Format check	36s
Soundness / Broken symlinks check	5s
Soundness / License headers check	9s
Soundness / Shell check	33s
Soundness / YAML lint check	3s
Soundness / Python lint check	5s
	27m 50s

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