update snapcraft.yaml

Author: gcclinux

.github/workflows/build-snap.yml

@@ -8,12 +8,12 @@ description: |
   and multi-language support. Features include basic editing, undo/redo, 
   printing, and encrypted file format (.sstp).
 
-website: https://github.com/gcclinux/smalltextpad
+website: https://gcclinux.github.io/smalltextpad/
 source-code: https://github.com/gcclinux/smalltextpad
 issues: https://github.com/gcclinux/smalltextpad/issues
 contact: https://github.com/gcclinux/smalltextpad/discussions
 license: MIT
-donation: https://github.com/sponsors/gcclinux
+donation: https://buymeacoffee.com/gcclinux
 
 grade: stable
 confinement: strict