Docs: Fix conditional syntax examples to use {{if}} not {{#if}}

The README and just-the-docs site examples both used {{#if condition}}
syntax (Mustache-with-hash). The actual TokenParser implementation
dispatches on span.StartsWith("if", ...) — no '#' handling — and all
existing unit tests use {{if ...}}. Documentation drifted from the
implementation.

Affected lines:
- README.md:89 and :104 — both code blocks demonstrating conditionals
- docs/site/syntax/examples.md:65 and :82 — corresponding examples

No code changes; tests already prove the {{if}} form works.

Author: bfarmer67

README.md

@@ -86,7 +86,7 @@ Console.WriteLine(result); // Output: hello Hari Seldon.
 You can use conditional tokens to control the flow based on conditions.
 
 ```csharp
-var template = "{{#if condition}}hello {{name}}.{{/if}}";
+var template = "{{if condition}}hello {{name}}.{{/if}}";
 
 var result = Template.Render(template, new()
 {
@@ -101,7 +101,7 @@ Console.WriteLine(result); // Output: hello me.
 ```
 
 ```csharp
-var template = "hello {{#if condition}}{{name1}}{{else}}{{name2}}{{/if}}.";
+var template = "hello {{if condition}}{{name1}}{{else}}{{name2}}{{/if}}.";
 
 var result = Template.Render(template, new()
 {

docs/site/syntax/examples.md

@@ -62,7 +62,7 @@ Console.WriteLine(result); // Output: hello Hari Seldon.
 ### If Statement
 
 ```csharp
-var template = "{{#if condition}}hello {{name}}.{{/if}}";
+var template = "{{if condition}}hello {{name}}.{{/if}}";
 
 var result = Template.Render(template, new()
 {
@@ -79,7 +79,7 @@ Console.WriteLine(result); // Output: hello me.
 ### If-Else Statement
 
 ```csharp
-var template = "hello {{#if condition}}{{name1}}{{else}}{{name2}}{{/if}}.";
+var template = "hello {{if condition}}{{name1}}{{else}}{{name2}}{{/if}}.";
 
 var result = Template.Render(template, new()
 {