[Protocol]: Use FdSymbolA-Book instead of FdSymbolA-Regular (not available everywhere) for \smallcirc

Author: nuttycom

protocol/protocol.tex

@@ -437,7 +437,7 @@
 % <https://tex.stackexchange.com/a/309445/78411>
 \DeclareFontFamily{U}{FdSymbolA}{}
 \DeclareFontShape{U}{FdSymbolA}{m}{n}{
-    <-> s*[.4] FdSymbolA-Regular
+    <-> s*[.4] FdSymbolA-Book
 }{}
 \DeclareSymbolFont{fdsymbol}{U}{FdSymbolA}{m}{n}
 \DeclareMathSymbol{\smallcirc}{\mathord}{fdsymbol}{"60}