examples: Update content of "draggabletext"

Qt Quarterly was shut down long ago.

Fixes: QTBUG-119982
Pick-to: 6.7 6.6
Change-Id: I910b03ab11bf9aa728cc23d736a6f13902b6fcfe
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

examples/widgets/draganddrop/draggabletext/words.txt

@@ -1,41 +1,35 @@
 Qt
-Quarterly
+Academy
+is
+where
+you
+begin
+your
+journey
+into
+Qt
+It
 is
 a
-paper
-based
-newsletter
-exclusively
-available
-to
-Qt
-customers
-Every
-quarter
-we
-mail
-out
-an
-issue
+learning
+platform
 that
-we
-hope
-will
-bring
-added
-insight
-and
-pleasure
+can
+teach
+you
+everything
+from
+the
+basics
 to
-your
-Qt
-programming
-with
-high
-quality
-technical
-articles
-written
-by
-Qt
-experts
+the
+details
+and
+is
+open
+to
+students
+and
+experienced
+programmers
+alike