Update hardcoded vaadin version to 24.7.3 (#4276)

* Update hardcoded vaadin version to 24.7.3

* Update _vaadin-version.adoc

---------

Co-authored-by: Zhe Sun <[email protected]>

Author: vaadin-bot

articles/_vaadin-version.adoc

@@ -1,4 +1,4 @@
-:vaadin-version: 24.7.2
-:vaadin-flow-version: 24.7.4
+:vaadin-version: 24.7.3
+:vaadin-flow-version: 24.7.5
 :vaadin-seven-version: 7.7.38
 :vaadin-eight-version: 8.20.0