use more descriptive title

vladak · vladak · commit 83701e2c18ee · 2025-12-08T10:28:49.000+01:00
diff --git a/threads.tex b/threads.tex
@@ -341,7 +341,7 @@
 ]]])
 
 \begin{slide}
-\sltitle{Terminating the calling thread}
+\sltitle{Exiting and waiting for a thread to exit}
 ifdef([[[NOSPELLCHECK]]], [[[
 \texttt{void \funnm{pthread\_exit}(void *\emph{val\_ptr});}
 ]]])
