docs(schemagen): Update/expand documentation on propertynaming

It seems this area of the documentation was a little out of date, I have updated it!

Author: ProbablePrime

_docs/schema/schemagen/schema-generation.md

@@ -270,16 +270,34 @@ There are four options:
 
 ### Property naming {#schema-schemagen-property-names}
 
-In addition to the `[JsonPropertyName]` attribute, the configuration exposes a `PropertyNamingMethod` that allows you to define a custom method for altering property names from your code into the schema.  The `PropertyNamingMethods` static class defines a few commonly-used conventions:
+In addition to the `[JsonPropertyName]` attribute, the configuration(`SchemaGeneratorConfiguration`) exposes a `PropertyNameResolver` delegate that allows you to define a custom method for altering property names from your code into the schema. The system will adjust property names accordingly.
 
-- `camelCase`
-- `PascalCase`
-- `kebab-case`
-- `UPPER-KEBAB-CASE`
-- `snake_case`
-- `UPPER_SNAKE_CASE`
+```C#
+SchemaGeneratorConfiguration config = new()
+{
+  // All property names will be lowercase!
+  PropertyNameResolver = x => x.Name.ToLower()
+};
+```
+
+The `PropertyNameResolvers` static class defines a few commonly-used conventions:
+
+| ResolvedName                           | Example             |
+|----------------------------------------|---------------------|
+| PropertyNameResolvers.CamelCase        | `camelCase`         |
+| PropertyNameResolvers.PascalCase       | `PascalCase`        |
+| PropertyNameResolvers.KebabCase        | `kebab-case`        |
+| PropertyNameResolvers.UpperKebabCase   | `UPPER-KEBAB-CASE`  |
+| PropertyNameResolvers.SnakeCase        | `snake_case`        |
+| PropertyNameResolvers.UpperSnakeCase   | `UPPER_SNAKE_CASE`  |
 
-Just set this property and the system will adjust property names accordingly.
+You can use them like this:
+```c#
+SchemaGeneratorConfiguration config = new()
+{
+  PropertyNameResolver = PropertyNameResolvers.CamelCase
+};
+```
 
 Note that the `[JsonPropertyName]` attribute takes precedence, so you can still use this to get custom naming when you've configured a method.