[Doc] Fix a typo in math/math_module.md #19162

Job	Run time
Check files	7s
Show Environment Variables	9s
Check Static Analyzer	1m 7s
Build and Test (GPU) (sm70, driver550)	23s
Build and Test macos (CPU) (macos-10.15, 3.7, ON, cpu,vulkan)	21s
Build and Test (GPU) (sm70, driver510)	28s
Build and Test (AMDGPU)	18s
Build and Test (Docs)	59s
Build and Test (GPU) (not sm70, driver550)	23s
Build and Test (GPU) (not sm70, driver510)	23s
Build and Test (manylinux2014)	8m 49s
Build and Test (Apple M1) (macos-latest, 3.8)	18s
Build and Test Windows (sm70)	59s
Build iOS C-API Static Library	15s
Build and Test Windows (not sm70)	1m 1s
AOT Build and Test Android Apps	19s
AOT Build and Test Android Headless Demos	16s
AOT Build and Test Android Unity Examples	20s
AOT Build and Test (GPU) (self-hosted, cuda, vulkan, cn, driver550)	25s
	17m 20s

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