feat(files): rename pottery sherds to pottery shards

[SquatchHunter]

Renames 'Pottery Sherds' to 'Pottery Shards'. Addresses: #55 By checking the following boxes with an X, you ensure that:

• [x] The pack was tested ingame in at least one device.

• [x] The pack is an existing BT pack, is a missing pack from VT or is an accepted pack/change in a discussion.

• [x] The pack code follows the style guide.

• [x] The commits follow the contribution guidelines.

• [x] The PR follows the contribution guidelines.

• [x] (Optional) Tested in Windows

• [ ] (Optional) Tested in Android

• [ ] (Optional) Tested in iOS

• [ ] (Optional) Tested in any console

• [ ] (Optional) Tested in BDS

[drav0011]

Leave other languages than english out for this change, it does not affect them