doc: remove italics from links for latex/pdf

Certain links generated in the documentation are styled in italics,
which is not preferred. Override Sphinx's cross-reference links to
prevent this.

Signed-off-by: James Knight <[email protected]>

Author: jdknight

doc/conf.py

@@ -86,10 +86,12 @@
     # iso datetime support
     # disable hyphenatation
     # disable justified text
+    # remove italics from links
     'preamble': r'''
         \usepackage{datetime2}
         \usepackage[none]{hyphenat}
         \usepackage[document]{ragged2e}
+        \def\sphinxcrossref#1{#1}
     ''',
 }