Update 8.18.md

Author: Adam Dupaski

content/en/docs/releasenotes/studio-pro/8/8.18.md

@@ -12,7 +12,7 @@ This is the [LTS](/releasenotes/studio-pro/lts-mts/#lts) version 8 release for a
 
 ## 8.18.26 {#81826}
 
-**Release date: September 18, 2023**
+**Release date: September 19, 2023**
 
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