[linalg.syn] Add header index entry.

Eelis · Eelis · commit b4ea113010b1 · 2024-02-17T15:00:03.000+01:00
diff --git a/source/numerics.tex b/source/numerics.tex
@@ -10472,6 +10472,7 @@
 
 \rSec2[linalg.syn]{Header \tcode{<linalg>} synopsis}
 
+\indexheader{linalg}%
 \begin{codeblock}
 namespace std::linalg {
   // \ref{linalg.tags.order}, storage order tags
