chore: bump version to 8.19.6-SNAPSHOT (#1457)

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

Author: elastic-vault-github-plugin-prod[bot]

internal/version/version.go

@@ -21,4 +21,4 @@ package version
 const Client = Version
 
 // Version is the version of the client.
-const Version = "8.19.5"
+const Version = "8.19.6-SNAPSHOT"