Fix misspelling of `EDXAAP` to `EDXAPP` for `SESSION_COOKIE_SAMESITE`.
Fix misspelling of `EDXAAP` to `EDXAPP` for `SESSION_COOKIE_SAMESITE`.


stvstnfrd/configuration,arbrandes/edx-configuration,stvstnfrd/configuration,arbrandes/edx-configuration,mitodl/configuration,edx/configuration,edx/configuration,stvstnfrd/configuration,stvstnfrd/configuration,stvstnfrd/configuration,arbrandes/edx-configuration,EDUlib/configuration,mitodl/configuration,edx/configuration,mitodl/configuration,EDUlib/configuration,EDUlib/configuration,arbrandes/edx-configuration,EDUlib/configuration,mitodl/configuration,arbrandes/edx-configuration,EDUlib/configuration,edx/configuration