chore: Add suppressErrorRendering to secure flags.

Co-authored-by: Alois Klink <alois@aloisklink.com>

cypress/platform/suppressError.html

@@ -21,6 +21,24 @@
       <pre class="mermaid">
   flowchart
       a[This should be visible]
+    </pre
+      >
+      <pre class="mermaid">
+  ---
+  config:
+    suppressErrorRendering: true # This should not affect anything, as suppressErrorRendering is a secure config
+  ---
+  flowchart
+    a --< b
+    </pre
+      >
+      <pre class="mermaid">
+  ---
+  config:
+    suppressErrorRendering: false # This should not affect anything, as suppressErrorRendering is a secure config
+  ---
+  flowchart
+    a --< b
     </pre
       >
     </div>

packages/mermaid/src/schemas/config.schema.yaml

@@ -155,7 +155,7 @@ properties:
       in the current `currentConfig`.
 
       This prevents malicious graph directives from overriding a site's default security.
-    default: ['secure', 'securityLevel', 'startOnLoad', 'maxTextSize']
+    default: ['secure', 'securityLevel', 'startOnLoad', 'maxTextSize', 'suppressErrorRendering']
     type: array
     items:
       type: string