Bump extension version (#352)

Author: microbit-robert

src/makecode/__snapshots__/utils.test.ts.snap

@@ -5295,7 +5295,7 @@ namespace ml {
 ml.onStart(ml.event.Wave, function () {basic.showIcon(IconNames.Rabbit)})
 ml.onStart(ml.event.Clap, function () {basic.showIcon(IconNames.EighthNote)})
 ",
-    "pxt.json": "{"name":"Untitled","description":"","dependencies":{"core":"*","microphone":"*","radio":"*","machine-learning":"github:microbit-foundation/pxt-microbit-ml#v0.4.4"},"files":["main.ts","main.blocks","autogenerated.ts","dataset.json","pxt.json","README.md"],"preferredEditor":"blocksprj"}",
+    "pxt.json": "{"name":"Untitled","description":"","dependencies":{"core":"*","microphone":"*","radio":"*","machine-learning":"github:microbit-foundation/pxt-microbit-ml#v0.4.5"},"files":["main.ts","main.blocks","autogenerated.ts","dataset.json","pxt.json","README.md"],"preferredEditor":"blocksprj"}",
   },
 }
 `;
@@ -10577,7 +10577,7 @@ namespace ml {
 </xml>",
     "main.ts": "ml.onStart(ml.event.Still, function () {basic.showIcon(IconNames.Asleep)})
 ",
-    "pxt.json": "{"name":"Untitled","description":"","dependencies":{"core":"*","microphone":"*","radio":"*","machine-learning":"github:microbit-foundation/pxt-microbit-ml#v0.4.4"},"files":["main.ts","main.blocks","autogenerated.ts","dataset.json","pxt.json","README.md"],"preferredEditor":"blocksprj"}",
+    "pxt.json": "{"name":"Untitled","description":"","dependencies":{"core":"*","microphone":"*","radio":"*","machine-learning":"github:microbit-foundation/pxt-microbit-ml#v0.4.5"},"files":["main.ts","main.blocks","autogenerated.ts","dataset.json","pxt.json","README.md"],"preferredEditor":"blocksprj"}",
   },
 }
 `;

src/makecode/utils.ts

@@ -18,7 +18,7 @@ export const filenames = {
 
 // Exported for testing.
 export const extensionName = "machine-learning";
-const extensionURL = "github:microbit-foundation/pxt-microbit-ml#v0.4.4";
+const extensionURL = "github:microbit-foundation/pxt-microbit-ml#v0.4.5";
 
 export const pxt = {
   name: "Untitled",