Fixed typos in ImathVec documentation of equalWithAbs/RelError functi… #5

Job	Run time
Windows.9: msys2-ucrt64, static / steps	5m 45s
Windows.2: Debug / steps	4m 15s
Windows.3: static / steps	19m 17s
Windows.5: vfx2023 / steps	18m 4s
Windows.7: msys2-mingw32, static / steps	5m 11s
Windows.1: Release / steps	17m 32s
Windows.4: pkgconfig=OFF, testing=OFF / steps	1m 18s
Linux.6: clang / steps	18m 56s
Windows.8: msys2-ucrt64 / steps	4m 39s
Windows.6: msys2-mingw32 / steps	4m 33s
Linux.7: cmake 4 / steps	18m 21s
Linux.1: Release / steps	19m 1s
Linux.4: pkgconfig=OFF, testing=OFF, python=OFF / steps	1m 9s
Linux.5: custom namespace / steps	18m 27s
Linux.2: Debug / steps	13m 15s
Linux.3: static / steps	19m 38s
macOS.2: Debug / steps	8m 21s
macOS.4: pkgconfig=OFF, testing=OFF / steps	35s
macOS.6: Apple Frameworks / steps	42s
macOS.3: static / steps	12m 34s
macOS.1: Release / steps	14m 13s
macOS.5: macos-13 / steps	38m 49s
	4h 24m 35s

Provide feedback