docs: clarify the syntax of examples

docs/configuration.rst

@@ -2,6 +2,8 @@
 Configuration
 #############
 
+.. highlight:: ini
+
 Scriv tries hard to be adaptable to your project's needs.  Many aspects of its
 behavior can be customized with a settings file.
 
@@ -30,6 +32,20 @@ All of the possible files will be read, and settings will cascade.  So for
 example, setup.cfg can set the fragment directory to "scriv.d", then
 "scriv.d/scriv.ini" will be read.
 
+The settings examples here show .ini syntax.  If you are using a pyproject.toml
+file for settings, you will need to adjust for TOML syntax.  This .ini
+example::
+
+    [scriv]
+    version = literal: pyproject.toml: project.version
+
+would become:
+
+.. code-block:: toml
+
+    [tool.scriv]
+    version = "literal: pyproject.toml: project.version"
+
 
 Settings Syntax
 ===============