Fix document misspelling

[KyleChuang]

Motivate of the pull request

• To address an existing issue. If so, please provide a link to the issue:
• Breaking new feature. If so, please describe details in the description part.

Describe the technical details

What is currently done? (Provide issue link if applicable)

What does this pull request change?

Which part of the code base require a change

• VPR
• Tileable routing architecture generator
• OpenFPGA libraries
• FPGA-Verilog
• FPGA-Bitstream
• FPGA-SDC
• FPGA-SPICE
• Flow scripts
• Architecture library
• Cell library
• Documentation
• Regression tests
• Continous Integration (CI) scripts

Impact of the pull request

• Require a change on Quality of Results (QoR)
• Break back-compatibility. If so, please list who may be influenced.

[tangxifan]

@KyleChuang Thanks for contribution. However, I see you format the CMakeList.txt. The formatting standard for CMakeList.txt has not been decided yet. I would like to do more researches before making such decision. Other changes look fine.

If you can revert the changes in CMakeLists.txt, we can merge this PR.

[KyleChuang]

Hello
I revert CMakelists.txt based on your suggestion.