[Power Pages Config] Update description for defaultLandingPage property (SchemaStore#4836)

* [Power Pages Config] Update description for defaultLandingPage property

- ✏️ Revised the description for the defaultLandingPage property to clarify that the path should be relative to the compiledPath.
- 🗑️ Removed the pattern validation for the defaultLandingPage property.

-Priyanshu

* Add code owners

Author: priyanshu92

.github/CODEOWNERS

@@ -49,3 +49,7 @@ src/negative_test/contextive-glossary/ @chrissimon-au
 # pnpm Schemas:
 src/schemas/json/pnpm-workspace.json @danielbayley @btea
 src/test/pnpm-workspace/ @danielbayley @btea
+
+# Managed by Power Pages Team:
+src/schemas/json/powerpages.config.json @priyanshu92 @ashishchoudhary001 @amitjoshi438 @tyaginidhi
+src/test/powerpages.config/ @priyanshu92 @ashishchoudhary001 @amitjoshi438 @tyaginidhi

src/schemas/json/powerpages.config.json

@@ -10,8 +10,7 @@
     },
     "defaultLandingPage": {
       "type": "string",
-      "description": "The default HTML page to load when opening the website",
-      "pattern": "^[\\w.-]+\\.html$"
+      "description": "The path of the default HTML page to load when opening the website. This path should be relative to the compiledPath."
     },
     "compiledPath": {
       "type": "string",