grammer

Author: kai-ion

README.md

@@ -59,7 +59,7 @@ RPM based Linux distributions example:
    `sudo [yum|dnf|zypper] install libcurl-devel`
 
 Optional: zlib (for compression)
-zlib is **optional** and only required if you need gzip/deflate compression
+zlib is optional and only required if you need gzip/deflate compression
 support (for example, when your libcurl and workloads use HTTP content-encoding).
 If your libcurl is already built with zlib, you typically don't need to install
 zlib headers separately unless your build complains about missing zlib.