fix: mermaid subgraph should render text content properly (#1072)

Author: charIeszhao

package.json

@@ -99,10 +99,10 @@
       "@babel/runtime@<7.27.0": "^7.27.0",
       "@babel/runtime-corejs3@<7.27.0": "^7.27.0",
       "axios@>=1.0.0 <1.8.3": "^1.8.3",
-      "dompurify@<3.2.4": "^3.2.4",
       "esbuild@<0.25.0": "^0.25.0",
       "estree-util-value-to-estree@<3.3.3": "^3.3.3",
       "image-size@>=1.1.0 <1.2.1": "^1.2.1",
+      "mermaid@<11.5.0": "^11.6.0",
       "path-to-regexp@<0.1.12": "^0.1.12",
       "prismjs@<1.30.0": "^1.30.0"
     }