Fix angle brackets in MouseButtonEvent and MouseWheel #1255

Job	Run time
mypy	26s
ruff	5s
sdist	2m 19s
parse_sdl (windows-latest, 3.2.16)	37s
parse_sdl (macos-latest, 3.2.16)	25s
test-docs	4m 13s
linux-wheels (x86_64, cp310-manylinux*)	3m 55s
tox (ubuntu-latest)	4m 36s
build (windows-latest, pypy-3.10, x86)	3m 19s
pyodide	5m 14s
linux-wheels (x86_64, pp310-manylinux*)	3m 27s
build (windows-latest, pypy-3.10, x64)	3m 31s
build (ubuntu-latest, 3.10, x64)	5m 59s
linux-wheels (aarch64, cp310-manylinux*)	4m 15s
build-macos (pp310-*)	3m 29s
linux-wheels (aarch64, pp310-manylinux*)	3m 46s
build (windows-latest, 3.10, x86)	2m 49s
build (ubuntu-latest, pypy-3.10, x64)	5m 20s
build (windows-latest, 3.10, x64)	2m 46s
build-macos (cp310-*_universal2)	1m 46s
publish	0s
	1h 2m 17s

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