fix(app): remove iOS icon alpha border #73

Job	Run time
build (macos-latest, --target aarch64-apple-darwin, aarch64-apple-darwin)	4m 46s
build (windows-latest, x86_64-pc-windows-msvc)	7m 57s
build (macos-latest, --target x86_64-apple-darwin, x86_64-apple-darwin)	6m 2s
build (ubuntu-22.04, x86_64-unknown-linux-gnu)	7m 32s
build-android	18m 22s
create-updater-json	8s
	44m 47s

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