chore: update docusaurus to point to v7 docs as latest (#1848)

Author: dariuszkuc

website/docs/blogs-and-videos.md

@@ -8,6 +8,7 @@ Here are some links to other blog posts and videos which may provide further exa
 
 Articles and videos specifically about `graphql-kotlin`
 
+-   📺  [Supercharge your GraphQL with Ktor and GraalVM (Dariusz Kuc)(KotlinConf 2023)](https://www.youtube.com/watch?v=gqQwTFeHOUU&list=PLlFc5cFwUnmwcJ7ZXyMmS70A9QFyUu1HI) (en)
 -   📝  [GraphQL Kotlin 6.0.0 Release](https://medium.com/expedia-group-tech/graphql-kotlin-6-0-0-release-2227fd066dcd)
 -   📝  [GraphQL Kotlin 4.0.0 Release](https://medium.com/expedia-group-tech/graphql-kotlin-4-0-0-release-eb87e150a192)
 -   📺  [Bootiful GraphQL with Kotlin (Dariusz Kuc, Guillaume Scheibel)(Spring One 2020)](https://www.youtube.com/watch?v=t9He4vHZC24) (en)

website/docusaurus.config.js

@@ -21,14 +21,14 @@ module.exports = {
       {
         docs: {
           editUrl: "https://github.com/ExpediaGroup/graphql-kotlin/tree/master/website",
-          lastVersion: '6.x.x',
+          lastVersion: 'current',
           showLastUpdateAuthor: true,
           showLastUpdateTime: true,
           sidebarPath: require.resolve('./sidebars.js'),
           versions: {
             current: {
-              label: 'pre-release',
-              path: '7.x.x'
+              label: '7.x.x',
+              path: ''
             }
           }
         }
@@ -71,7 +71,7 @@ module.exports = {
     },
     footer: {
       links: [],
-      copyright: "Copyright © 2022 Expedia, Inc.",
+      copyright: "Copyright © 2023 Expedia, Inc.",
       logo: {
         src: "img/Expedia-Group-Logo_E-Stacked.png"
       }