Change default value of updateSymbolsOnVariantUpdate and add in README

Author: antaalt

README.md

@@ -123,6 +123,7 @@ This extension contributes the following settings:
 *   `shader-validator.pathRemapping`: All virtual paths.
 *   `shader-validator.defines`: All custom macros and their values for linting.
 *   `shader-validator.serverPath`: Use a custom server instead of the bundled one.
+*   `shader-validator.updateSymbolsOnVariantUpdate`: Update symbol outline when changing variant. Will trigger a save event.
 
 ### HLSL specific settings: 
 

package.json

@@ -123,7 +123,7 @@
           "shader-validator.updateSymbolsOnVariantUpdate": {
             "description": "Automatically update the symbols on variant update. Will trigger a save on the file.",
             "type": "boolean",
-            "default": false
+            "default": true
           },
           "shader-validator.severity": {
             "type": "string",