Revise docs

docs/development/core/server/kibana-plugin-server.cspconfig.header.md

@@ -9,5 +9,5 @@ The CSP rules in a formatted directives string for use in a `Content-Security-Po
 <b>Signature:</b>
 
 ```typescript
-header: string;
+readonly header: string;
 ```

docs/development/core/server/kibana-plugin-server.cspconfig.rules.md

@@ -9,5 +9,5 @@ The CSP rules used for Kibana.
 <b>Signature:</b>
 
 ```typescript
-rules: string[];
+readonly rules: string[];
 ```

docs/development/core/server/kibana-plugin-server.cspconfig.strict.md

@@ -9,5 +9,5 @@ Specify whether browsers that do not support CSP should be able to use Kibana. U
 <b>Signature:</b>
 
 ```typescript
-strict: boolean;
+readonly strict: boolean;
 ```

docs/development/core/server/kibana-plugin-server.cspconfig.warnlegacybrowsers.md

@@ -9,5 +9,5 @@ Specify whether users with legacy browsers should be warned about their lack of
 <b>Signature:</b>
 
 ```typescript
-warnLegacyBrowsers: boolean;
+readonly warnLegacyBrowsers: boolean;
 ```

src/core/server/server.api.md

@@ -558,10 +558,10 @@ export interface CoreStart {
 export class CspConfig {
     // Warning: (ae-forgotten-export) The symbol "CspConfigType" needs to be exported by the entry point index.d.ts
     constructor(rawCspConfig?: Partial<CspConfigType>);
-    header: string;
-    rules: string[];
-    strict: boolean;
-    warnLegacyBrowsers: boolean;
+    readonly header: string;
+    readonly rules: string[];
+    readonly strict: boolean;
+    readonly warnLegacyBrowsers: boolean;
 }
 
 // @public