content(resources): rename article names to fit context

src/content/resources/cpp/pragma-once.md

@@ -2,7 +2,7 @@
 authors:
   - "sudonym#8623"
 created_at: 2019/10/6
-title: "pragma once FAQ"
+title: "pragma once"
 ---
 
 ## What is `#pragma once`?

src/content/resources/java/generics.md

@@ -2,7 +2,7 @@
 authors:
   - "supergrecko#3434"
 created_at: "2019/10/04"
-title: Generics in Java
+title: Generics
 ---
 
 ## What are generics?