update SPFx version reference

samples/react-pages-hierarchy/.devcontainer/devcontainer.json

@@ -1,7 +1,7 @@
 // For more information on how to run this SPFx project in a VS Code Remote Container, please visit https://aka.ms/spfx-devcontainer
 {
-	"name": "SPFx 1.18.2",
-	"image": "docker.io/m365pnp/spfx:1.18.2",
+	"name": "SPFx 1.20.0",
+	"image": "docker.io/m365pnp/spfx:1.20.0",
 	// Set *default* container specific settings.json values on container create.
 	"settings": {},
 	// Add the IDs of extensions you want installed when the container is created.

samples/react-pages-hierarchy/README.md

@@ -15,7 +15,7 @@ This web part allows users to create a faux page hierarchy in their pages librar
 | Every SPFx version is only compatible with specific version(s) of Node.js. In order to be able to build this sample, please ensure that the version of Node on your workstation matches one of the versions listed in this section. This sample will not work on a different version of Node.|
 |Refer to <https://aka.ms/spfx-matrix> for more information on SPFx compatibility.   |
 
-![SPFx 1.18.2](https://img.shields.io/badge/SPFx-1.18.2.0-green.svg) 
+![SPFx 1.20.0](https://img.shields.io/badge/SPFx-1.20.0.0-green.svg) 
 ![Node.js v18](https://img.shields.io/badge/Node.js-v18-green.svg) 
 ![Compatible with SharePoint Online](https://img.shields.io/badge/SharePoint%20Online-Compatible-green.svg)
 ![Does not work with SharePoint 2019](https://img.shields.io/badge/SharePoint%20Server%202019-Incompatible-red.svg)

samples/react-pages-hierarchy/assets/sample.json

@@ -9,7 +9,7 @@
       "This web part allows users to create a faux page hierarchy in their pages library and use it for page-to-page navigation."
     ],
     "creationDateTime": "2020-04-30",
-    "updateDateTime": "2024-01-11",
+    "updateDateTime": "2024-10-13",
     "products": [
       "SharePoint"
     ],
@@ -20,7 +20,7 @@
       },
       {
         "key": "SPFX-VERSION",
-        "value": "1.18.2"
+        "value": "1.20.0"
       },
       {
         "key": "SPFX-SUPPORTSTHEMEVARIANTS",