chore: Update URLs in demo index pages and "Blockly Plugins & Demos" page (#2623)

* chore: Update URLs in demos

* chore: Update URLs on Plugins and Demos page

Author: rpbourret

examples/generator-demo/index.html

@@ -28,7 +28,7 @@
     <p>
       &rarr; More info on
       <a
-        href="https://developers.google.com/blockly/guides/configure/web/code-generators"
+        href="https://developers.google.com/blockly/guides/create-custom-blocks/code-generation/overview"
         >Code Generators</a
       >
       and

examples/graph-demo/index.html

@@ -40,7 +40,7 @@
     <p>
       &rarr; More info on
       <a
-        href="https://developers.google.com/blockly/guides/configure/web/code-generators#generating_code"
+        href="https://developers.google.com/blockly/guides/app-integration/run-code#continuous_updates"
         >Realtime generation</a
       >&hellip;
     </p>

examples/toolbox-demo/index.html

@@ -22,10 +22,10 @@
     <p>This is a demo of a complex category structure for the toolbox.</p>
 
     <p>
-      &rarr; More info on the
+      &rarr; More info on
       <a
-        href="https://developers.google.com/blockly/guides/configure/web/toolbox"
-        >Toolbox</a
+        href="https://developers.google.com/blockly/guides/configure/web/toolboxes/category"
+        >Toolbox Categories</a
       >&hellip;
     </p>
 

gh-pages/_index.html

@@ -191,7 +191,7 @@ <h3 id="workspace">
   Workspace
 </h3>
 <p>
-  These plugins add new features and functionality to the Blockly workspace.
+  These plugins add new features and functionality to the Blockly workspace. Learn more about <a href="https://developers.google.com/blockly/guides/configure/web/configuration_struct">creating a workspace</a>.
 </p>
 <div class="grid">
   <a class="card" href="plugins/workspace-backpack/test/index.html">
@@ -361,7 +361,7 @@ <h3 id="toolbox">
   Toolbox
 </h3>
 <p>
-  These plugins add new features and functionality to the Blockly toolbox. Learn more about <a href="https://developers.google.com/blockly/guides/configure/web/toolbox">customizing the toolbox</a>.
+  These plugins add new features and functionality to the Blockly toolbox. Learn more about <a href="https://developers.google.com/blockly/guides/configure/web/toolboxes/toolbox">customizing the toolbox</a>.
 </p>
 <div class="grid">
   <a class="card" href="plugins/typed-variable-modal/test/index.html">
@@ -417,7 +417,7 @@ <h3 id="themes">
   Themes
 </h3>
 <p>
-  Themes let you customize the visual appearance of Blockly. Learn more about <a href="https://developers.google.com/blockly/guides/configure/web/appearance/overview">creating custom themes</a>.
+  Themes let you customize the visual appearance of Blockly. Learn more about <a href="https://developers.google.com/blockly/guides/configure/web/appearance/themes">creating custom themes</a>.
 </p>
 <div class="grid">
   <a class="card vertical" href="plugins/theme-dark/test/index.html">