Merge pull request #6840 from EnterpriseDB/pavanvd-patch-2

Update index.mdx

Author: djw-m

product_docs/docs/pgd/5.7/index.mdx

@@ -55,6 +55,7 @@ categories:
 pdf: true
 directoryDefaults:
   version: "5.7.0"
+displayBanner: '<b>Warning</b>: You are not reading the most recent version of this documentation.<br/>Documentation improvements are made only to the latest version.<br/>As per semantic versioning, PGD minor releases remain backward compatible and may include important bug fixes and enhancements.<br/> We recommend upgrading the latest minor release as soon as possible.<br/>If you want up-to-date information, read the <a href="https://www.enterprisedb.com/docs/pgd/latest/">latest PGD documentation</a>.'
 ---