Typo: sys.prefex -> sys.prefix

Closes SF# 812152

Baskport candidate for release23-main
diff --git a/Doc/dist/sysconfig.tex b/Doc/dist/sysconfig.tex
index c3e135d..db28e55 100644
--- a/Doc/dist/sysconfig.tex
+++ b/Doc/dist/sysconfig.tex
@@ -24,11 +24,11 @@
 
 
 \begin{datadesc}{PREFIX}
-  The result of \code{os.path.normpath(sys.prefex)}.
+  The result of \code{os.path.normpath(sys.prefix)}.
 \end{datadesc}
 
 \begin{datadesc}{EXEC_PREFIX}
-  The result of \code{os.path.normpath(sys.exec_prefex)}.
+  The result of \code{os.path.normpath(sys.exec_prefix)}.
 \end{datadesc}
 
 \begin{funcdesc}{get_config_var}{name}