Update package.json

@thechriskent Can you please remove code line 21 (which was "microsoft/rush-stack-compiler-3.7": "0.2.3",). Error was generated "name can only contain URL-Friendly characters" when that line was in the package.json, however after it was removed the code works fine. 
![image](https://user-images.githubusercontent.com/60085977/162118820-f09062fb-89ba-4285-aec0-5f5c11cde597.png)


> By submitting this pull request, you agree to the [contribution guidelines](https://github.com/pnp/sp-dev-fx-webparts/blob/main/CONTRIBUTING.md)

samples/js-propertycontrols-svg/package.json

@@ -18,7 +18,6 @@
     "@pnp/spfx-property-controls": "3.3.0"
   },
   "devDependencies": {
-    "microsoft/rush-stack-compiler-3.7": "0.2.3",
     "@microsoft/rush-stack-compiler-3.9": "0.4.47",
     "@microsoft/sp-build-web": "1.13.0",
     "@microsoft/sp-module-interfaces": "1.13.0",
@@ -29,4 +28,4 @@
     "ajv": "~5.2.2",
     "gulp": "4.0.2"
   }
-}
+}