replaced urls with github.io links

packages/api/README.md

packages/desktop-client/src/components/FatalError.js

...sktop-client/src/components/modals/CreateEncryptionKey.js

.../desktop-client/src/components/modals/FixEncryptionKey.js

packages/desktop-client/src/components/modals/ManageRules.js

...ges/desktop-client/src/components/modals/WelcomeScreen.js

packages/desktop-client/src/components/tutorial/Final.js

packages/desktop-client/src/components/tutorial/Intro.js

packages/desktop-electron/menu.js

packages/import-ynab5/README.md

packages/loot-core/src/client/shared-listeners.js

packages/loot-design/src/components/manager/ImportYNAB5.js

packages/mobile/src/components/manager/Intro.js

packages/mobile/src/components/modals/CreateEncryptionKey.js