Typo

Author: jinningwang

README.md

@@ -5,7 +5,7 @@ This wiki is an open reference designed to compile and share terminologies used
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+[![GitHub last commit (main)](https://img.shields.io/github/last-commit/ps-wiki/ps-wiki.github.io/main?label=last%20commit%20to%20master)](https://github.com/ps-wiki/ps-wiki.github.io/commits/main/)
 
 ## Why This Wiki Exists