[Diag-Experimental-Formatting] Update some flag usage in tests post rebase

Author: owenv

test/SourceKit/Sema/educational_note_diags.swift

@@ -1,6 +1,6 @@
 extension (Int, Int) {}
 
-// RUN: %sourcekitd-test -req=sema %s -- -Xfrontend -enable-descriptive-diagnostics -Xfrontend -diagnostic-documentation-path -Xfrontend /educational/notes/path/prefix %s | %FileCheck %s -check-prefix=DESCRIPTIVE
+// RUN: %sourcekitd-test -req=sema %s -- -Xfrontend -enable-educational-notes -Xfrontend -diagnostic-documentation-path -Xfrontend /educational/notes/path/prefix %s | %FileCheck %s -check-prefix=DESCRIPTIVE
 
 // DESCRIPTIVE:      key.description: "non-nominal type
 // DESCRIPTIVE:      key.educational_note_paths: [