Update specialized.mdx (#5474)

Author: bene2k1

pages/instances/reference-content/specialized.mdx

@@ -1,5 +1,5 @@
 ---
-title: The right Instance for workload purposes
+title: The right Instance for specialized purposes
 description: Find out more about Instances from Scaleway's Specialized range, such as POP2-HC, POP2-HN, and POP2-HM.
 dates:
   validation: 2025-06-24