Fix `asset-source-website.patch` line number

[BD103]

Objective

• Ever since #13177, the check-example-showcase-patches-still-work job has been failing in the merge queue.
• Specifically, the asset-source-website.patch file which modifies bevy_asset's lib.rs.

Solution

• Re-create the patch.
  • Due to new content being added, the line numbers were off.
• Also, turns out that typos was checking patch files. This turned into a CI error, so I disabled that too. Patches shouldn't really be modified manually, the original source should be. (Also it was erroring on the commit hash.)

Testing

• Test the new patch works by running git apply tools/example-showcase/asset-source-website.patch.
• Verify the merge queue passes with the check-example-showcase-patches-still-work job succeeding.

[BD103]

CI appeared to be failing because typos thought the commit number was a typo. I've excluded patch files from this check for the future.

[BD103]

Marking this as trivial :)