Update tracing.md

Framework name correction

Author: tomek120k

proposed/tracing.md

@@ -17,7 +17,7 @@ TBD
 ## Definitions
 
 * **Framework** - An application framework (or micro-framework) that runs a developers code.  
-  Eg. Laravel, Symphony, CakePHP, Slim
+  Eg. Laravel, Symfony, CakePHP, Slim
 * **Library** - Any library that developers may include that adds additional functionality  
   Eg. Image Manipulation, HTTP Clients, 3rd Party SDK's 
-* **Provider** - An organization that offers APM as a service. Typically via a composer package
+* **Provider** - An organization that offers APM as a service. Typically via a composer package