fix(named_req): nix, and remove prefix "Named Requirements"

Author: HOMODELUNA

src/content/docs/cpp/language/named_req/_meta.yml

@@ -1 +1 @@
-label: Name Requirements
+label: Named Requirements

src/content/docs/cpp/language/named_req/copy-asssignable.mdx

@@ -1,5 +1,5 @@
 ---
-title: "C++ named requirements: CopyAssignable"
+title: "CopyAssignable"
 cppdoc:
   revision:
     since: C++11

src/content/docs/cpp/language/named_req/default-constructible.mdx

@@ -1,5 +1,5 @@
 ---
-title: "C++ named requirements: DefaultConstructible"
+title: "DefaultConstructible"
 cppdoc:
   revision:
     since: C++11

src/content/docs/cpp/language/named_req/destructible.mdx

@@ -1,5 +1,5 @@
 ---
-title: "C++ named requirements: Destructible"
+title: "Destructible"
 cppdoc:
   revision:
     since: C++11

src/content/docs/cpp/language/named_req/hash.mdx

@@ -1,5 +1,5 @@
 ---
-title: "C++ named requirements: Hash"
+title: "Hash"
 cppdoc:
   revision:
     since: C++11

src/content/docs/cpp/language/named_req/swappable.mdx

@@ -1,5 +1,5 @@
 ---
-title: "C++ named requirements: Swappable"
+title: "Swappable"
 cppdoc:
   revision:
     since: C++11