Fix retquire

doc/install.html

@@ -19,12 +19,12 @@ CLASS="NAVHEADER"
 <h1>Installation</h1>
 These docs only cover installing PyKDE from source (ie building and compiling PyKDE). You
 should read the "Testing" section at the end of this page even if installing from RPMs. RPM
-installs also have the same System Retquirements as noted in the next section.
+installs also have the same System Requirements as noted in the next section.
 <p>
 Before reporting bugs, please read the <a href="trouble.html">Troubleshooting</a> and
 <a href="switches.html">build.py Options</a> pages.
 </p>
-<h2>System Retquirements</h2>
+<h2>System Requirements</h2>
 <p>PyKDE only runs on Linux or other Unix-based systems. The usual tools (compiler,
 linker, make, etc) are required. In addition you need:
 </p>