Update version from 6.1 to 7.1 in antora.yml

Author: ttelang

antora.yml

@@ -1,6 +1,6 @@
 name: microprofile-tutorial          # Component name/identifier
 title: MicroProfile Tutorial         # Display title for the component
-version: 6.1                        # Version of this component
+version: 7.1                        # Version of this component
 edit_url: https://github.com/microprofile/microprofile-tutorial/tree/main/modules/ROOT/pages/{path} 
 asciidoc:                           # AsciiDoc processing settings
   attributes:                       # Document attributes