typo fix in ECC.py #927

Job	Run time
mypy	15s
build_python_27 (ubuntu-20.04, yes)	2m 26s
build_python_27 (ubuntu-20.04, no)	2m 26s
build (3.6, yes, ubuntu-20.04)	2m 24s
build_python_27 (windows-latest, yes)	3m 46s
build (3.6, no, ubuntu-20.04)	2m 20s
build_python_27 (windows-latest, no)	3m 40s
python_no_gil	3m 6s
build (3.7, yes, ubuntu-20.04)	2m 25s
test_c_linux (0, x64)	1m 7s
test_c_linux (0, x32)	1m 3s
build (3.7, no, ubuntu-20.04)	2m 24s
test_c_windows (x64)	45s
test_c_linux (1, x64)	55s
test_c_windows (win32)	48s
build (3.8, yes, ubuntu-20.04)	2m 10s
test_c_linux (1, x32)	1m 24s
build (3.8, no, ubuntu-20.04)	2m 12s
build (3.9, yes, ubuntu-20.04)	2m 13s
build (3.9, no, ubuntu-20.04)	2m 7s
build (3.10, yes, ubuntu-20.04)	2m 16s
build (3.10, no, ubuntu-20.04)	2m 11s
build (3.11, yes, ubuntu-20.04)	1m 51s
build (3.11, no, ubuntu-20.04)	1m 51s
build (3.12, yes, ubuntu-20.04)	1m 55s
build (3.12, no, ubuntu-20.04)	2m 0s
build (3.13-dev, yes, ubuntu-20.04)	1m 56s
build (3.13-dev, no, ubuntu-20.04)	2m 10s
build (3.12, yes, macos-12)	3m 45s
build (3.12, no, windows-latest)	3m 54s
build (3.12, yes, windows-latest)	3m 57s
build (pypy2.7, no, ubuntu-latest)	1m 30s
build (pypy3.9, no, ubuntu-latest)	1m 38s
	1h 10m 50s

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