Migrate Stencilr tool off Glitch

[Jaqster]

Glitch is going out of business and will stop web hosting on July 8th (https://blog.glitch.com/post/changes-are-coming-to-glitch).

Peli, can you move your Stencilr tool somewhere else? GitHub Pages?
https://arcade-stencils.glitch.me

[Jaqster]

Pages that need to be updated with new link:

• https://arcade.makecode.com/arts-and-crafts/tshirt
• https://arcade.makecode.com/arts-and-crafts/lego-bricks-murals
• https://arcade.makecode.com/arts-and-crafts/laser-cut-stencils
• https://arcade.makecode.com/arts-and-crafts/perler-bead-sprites