Update docker version to 20.10.21
Update docker version to 20.10.21

Closes gh-32893

wilkinsona/spring-boot,dreis2211/spring-boot,aahlenst/spring-boot,scottfrederick/spring-boot,htynkn/spring-boot,vpavic/spring-boot,vpavic/spring-boot,aahlenst/spring-boot,htynkn/spring-boot,spring-projects/spring-boot,htynkn/spring-boot,aahlenst/spring-boot,htynkn/spring-boot,dreis2211/spring-boot,wilkinsona/spring-boot,aahlenst/spring-boot,vpavic/spring-boot,wilkinsona/spring-boot,spring-projects/spring-boot,dreis2211/spring-boot,spring-projects/spring-boot,scottfrederick/spring-boot,scottfrederick/spring-boot,dreis2211/spring-boot,spring-projects/spring-boot,htynkn/spring-boot,scottfrederick/spring-boot,dreis2211/spring-boot,dreis2211/spring-boot,scottfrederick/spring-boot,spring-projects/spring-boot,wilkinsona/spring-boot,vpavic/spring-boot,spring-projects/spring-boot,wilkinsona/spring-boot,vpavic/spring-boot,wilkinsona/spring-boot,aahlenst/spring-boot,vpavic/spring-boot,htynkn/spring-boot,aahlenst/spring-boot,scottfrederick/spring-boot