Fixed a small typo
Fixed a small typo

Original sentence: "Each pipe is also known as thread."
Corrected sentence: "Each pipe is also known as a thread."
MITI67/thebookofshaders,riibiax/thebookofshaders,riibiax/thebookofshaders,riibiax/thebookofshaders,MITI67/thebookofshaders,riibiax/thebookofshaders,riibiax/thebookofshaders,MITI67/thebookofshaders,MITI67/thebookofshaders,MITI67/thebookofshaders,riibiax/thebookofshaders,MITI67/thebookofshaders