fix: unpkg import in Getting Started codelab for blockly v11 (#2379)

* Fix unpkg import

* Update unpkg import in doc

* Use preferred unpkg files

Author: mark-friedman

codelabs/getting_started/getting_started.md

@@ -101,7 +101,10 @@ Open `starter-code/index.html` in a text editor and scroll to the end. You can s
 Add Blockly just before these two scripts. The order is important, because you will use Blockly objects later in `main.js`.  Your imports should now look like this:
 
 ```html
-<script src="https://unpkg.com/blockly"></script>
+<script src="https://unpkg.com/blockly/blockly_compressed.js"></script>
+<script src="https://unpkg.com/blockly/blocks_compressed.js"></script>
+<script src="https://unpkg.com/blockly/javascript_compressed.js"></script>
+<script src="https://unpkg.com/blockly/msg/en.js"></script>
 <script src="scripts/music_maker.js"></script>
 <script src="scripts/main.js"></script>
 ```

examples/getting-started-codelab/complete-code/index.html

@@ -52,7 +52,10 @@ <h1 class="mode-edit mode-blockly">Music Maker Configuration</h1>
       </div>
     </main>
 
-    <script src="https://unpkg.com/blockly"></script>
+    <script src="https://unpkg.com/blockly/blockly_compressed.js"></script>
+    <script src="https://unpkg.com/blockly/blocks_compressed.js"></script>
+    <script src="https://unpkg.com/blockly/javascript_compressed.js"></script>
+    <script src="https://unpkg.com/blockly/msg/en.js"></script>
     <script src="scripts/sound_blocks.js"></script>
     <script src="scripts/music_maker.js"></script>
     <script src="scripts/main.js"></script>