[DOCS] Add 7.17.3 to conditional attributes

Author: lcawl

docs/_releases.asciidoc

@@ -1,8 +1,9 @@
 // Versions for the 7.1.x releases
 :v7_17_0_released:
 :v7_17_1_released:
+:v7_17_2_released:
 
 // Handle version bump in the docs build
-ifeval::["{version}" == "7.17.2"]
-:v7_17_2_released:
+ifeval::["{version}" == "7.17.3"]
+:v7_17_3_released:
 endif::[]