Fix Typos in Comments and Docstrings

[leopardracer]

Description:
This pull request corrects minor typographical errors in the codebase:

• In kaolin/ops/spc/bf_recon.py, the word "cummulative" was corrected to "cumulative" in a comment.
• In kaolin/render/camera/intrinsics_pinhole.py, the word "heigh" was corrected to "height" in a docstring.

These changes improve code readability and maintain documentation accuracy. No functional code was modified.