Mark Death's Door as incompatible

Author: Z1ni

README.md

@@ -52,6 +52,7 @@ These games use different save formats than the Steam/Epic version that can't be
 | Game | Issue |
 |-|-|
 | Chivarly 2 | [#39](https://github.com/Z1ni/XGP-save-extractor/issues/39) |
+| Death's Door | [#79](https://github.com/Z1ni/XGP-save-extractor/issues/79) |
 | Forza Horizon 4 | [#71](https://github.com/Z1ni/XGP-save-extractor/issues/71) |
 | Tinykin | [#28](https://github.com/Z1ni/XGP-save-extractor/issues/28) |