2.2.0.rc1

What's Changed

• Update README files according to the latest changes by @tamasmak in #114
• upgrade spring boot to 3.1.2 by @ZheSun88 in #116
• Add example to the demo application for using the UI.navigate(route) by @tamasmak in #120
• Bump to 2.2-SNAPSHOT by @heruan in #113
• Bump to 2.2-SNAPSHOT part 2 by @tamasmak in #126
• chore!: set vaadin dependencies as provided by @manolo in #125

Full Changelog: 2.1.2...2.2.0.rc1