improve wording

Author: vladak

intro.tex

@@ -1281,7 +1281,7 @@
 an ELF object
 \item system by default looks for shared libraries in certain locations
 \item located libraries are mapped to the process address space via
-\funnm{mmap}() (will be later)
+\funnm{mmap}() (will be covered later)
 \end{itemize}
 \end{slide}