Documentation: Responsive prefix indicator mis-identified

[dyrector]

In all references for using the responsive prefix (i.e., xl:, lg:, md:, and sm:), the documentation says, "Add the responsive breakpoint keyword followed by a semi-colon as a prefix ...".

The correct term for the punctuation mark ":" is colon, not semi-colon (";").

I suggest correcting this mistake throughout the documentation, if PrimeFlex is to be viewed as a well-established framework.