Update source/single_source_version.rst

Co-authored-by: Sviatoslav Sydorenko (Святослав Сидоренко) <[email protected]>

Author: ChrisBarker-NOAA

source/single_source_version.rst

@@ -24,7 +24,7 @@ In general, the options are:
 
 2) The version can be hard-coded into the :file:`pyproject.toml` file -- and the build system can copy it into other locations it may be required.
 
-3) The version string can be hard-coded into the source code -- either in a special purpose file, such as ``_version.txt``, or as a attribute in the ``__init__.py``, and the build system can extract it at build time.
+3) The version string can be hard-coded into the source code -- either in a special purpose file, such as :file:`_version.txt`, or as a attribute in the :file:`__init__.py`, and the build system can extract it at build time.
 
 
 Consult your build system's documentation for their recommended method.