Update source/single_source_version.rst

Co-authored-by: Sviatoslav Sydorenko (Святослав Сидоренко) <wk.cvs.github@sydorenko.org.ua>

Author: ChrisBarker-NOAA

source/single_source_version.rst

@@ -9,7 +9,7 @@ Single-sourcing the Project Version
 
 One of the challenges in building packages is that the version string can be required in multiple places.
 
-* It needs to be specified when building the package (e.g. in :file:``pyproject.toml``)
+* It needs to be specified when building the package (e.g. in :file:`pyproject.toml`)
    - That will assure that it is properly assigned in the distribution file name, and in the installed package metadata.
 
 * A package may set a top level ``__version__`` attribute to provide runtime access to the version of the installed package. If this is done, the value of ``__version__`` attribute and that used by the build system to set the distribution's version should be kept in sync in :ref:`the build systems's recommended way <how_to_set_version_links>`.