[diff.cpp20.utilities] Hyphenate bit-fields (#6481)

Author: Eisenwave

source/compatibility.tex

@@ -281,7 +281,7 @@
 that do not support iteration when const-qualified and
 that are not copyable.
 \effect
-Valid \CppXX{} code that passes bit fields to formatting functions
+Valid \CppXX{} code that passes bit-fields to formatting functions
 may become ill-formed.
 For example:
 \begin{codeblock}