Change InlineArray sugar separator `x` -> `of` #216

Job	Run time
Run tests using swift-syntax-dev-utils (Linux)	22m 53s
Run tests using swift-syntax-dev-utils (Windows)	29m 36s
Validate generated code	2m 48s
Test / Linux (5.9 - jammy)	3m 52s
Test / macOS (Xcode ${{ matrix.xcode_version }} - ${{ matrix.os_version }} - ${{ matrix.arch }})	0s
Test / Linux (5.10 - jammy)	3m 47s
Test / Windows (5.9 - windows-2022)	19m 35s
Test / Linux (6.0 - jammy)	1s
Test / Windows (6.0 - windows-2022)	19m 18s
Test / Linux (6.1 - jammy)	3m 57s
Test / Windows (6.1 - windows-2022)	21m 12s
Test / Linux (nightly-main - jammy)	4m 48s
Test / Windows (nightly - windows-2019)	16m 17s
Test / Linux (nightly-6.1 - jammy)	5m 41s
Test / Windows (nightly-6.1 - windows-2019)	14m 47s
Test / Linux (nightly-6.2 - jammy)	4m 53s
Soundness / API breakage check	0s
Soundness / Broken symlinks check	4s
Soundness / Documentation check	4m 54s
Soundness / Format check	38s
Soundness / License headers check	10s
Soundness / Unacceptable language check	5s
Soundness / Python lint check	7s
Soundness / Shell check	34s
Soundness / YAML lint check	4s
	3h 0m 1s

Provide feedback