Bump cppcheck from 1.5.1 to 1.5.2 in /cmake/requirements

Bumps [cppcheck](https://github.com/msclock/cppcheck-wheel) from 1.5.1 to 1.5.2.
- [Release notes](https://github.com/msclock/cppcheck-wheel/releases)
- [Commits](https://github.com/msclock/cppcheck-wheel/compare/v1.5.1...v1.5.2)

---
updated-dependencies:
- dependency-name: cppcheck
  dependency-version: 1.5.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

cmake/requirements/requirements-cppcheck.txt

@@ -1 +1 @@
-cppcheck==1.5.1
+cppcheck==1.5.2

docs/mkdocs/docs/api/basic_json/operator_eq.md

@@ -11,12 +11,10 @@ template<typename ScalarType>
 bool operator==(ScalarType lhs, const const_reference rhs) noexcept(/* see below */); // (2)
 
 // since C++20
-class basic_json {
-    bool operator==(const_reference rhs) const noexcept;              // (1)
+bool operator==(const_reference rhs) const noexcept;             // (1)
 
-    template<typename ScalarType>
-    bool operator==(ScalarType rhs) const noexcept(/* see below */); // (2)
-};
+template<typename ScalarType>
+bool operator==(ScalarType rhs) const noexcept(/* see below */); // (2)
 ```
 
 1. Compares two JSON values for equality according to the following rules:

docs/mkdocs/docs/api/basic_json/operator_spaceship.md

@@ -2,12 +2,10 @@
 
 ```cpp
 // since C++20
-class basic_json {
-    std::partial_ordering operator<=>(const_reference rhs) const noexcept;  // (1)
+std::partial_ordering operator<=>(const_reference rhs) const noexcept;                   // (1)
 
-    template<typename ScalarType>
-    std::partial_ordering operator<=>(const ScalarType rhs) const noexcept(/* see below */); // (2)
-};
+template<typename ScalarType>
+std::partial_ordering operator<=>(const ScalarType rhs) const noexcept(/* see below */); // (2)
 ```
 
 1. 3-way compares two JSON values producing a result of type `std::partial_ordering` according to the following rules:

docs/mkdocs/docs/api/json_pointer/operator_eq.md

@@ -18,13 +18,11 @@ bool operator==(
     const json_pointer<RefStringTypeRhs>& rhs);                     // (2)
 
 // since C++20
-class json_pointer {
-    template<typename RefStringTypeRhs>
-    bool operator==(
-        const json_pointer<RefStringTypeRhs>& rhs) const noexcept;  // (1)
+template<typename RefStringTypeRhs>
+bool operator==(
+    const json_pointer<RefStringTypeRhs>& rhs) const noexcept;      // (1)
 
-    bool operator==(const string_t& rhs) const;                     // (2)
-};
+bool operator==(const string_t& rhs) const;                         // (2)
 ```
 
 1. Compares two JSON pointers for equality by comparing their reference tokens.

docs/mkdocs/docs/api/json_pointer/operator_spaceship.md

@@ -2,10 +2,8 @@
 
 ```cpp
 // since C++20
-class json_pointer {
-    template<typename RefStringTypeRhs>
-    std::strong_ordering operator<=>(const json_pointer<RefStringTypeRhs>& rhs) const noexcept; // *NOPAD*
-};
+template<typename RefStringTypeRhs>
+std::strong_ordering operator<=>(const json_pointer<RefStringTypeRhs>& rhs) const noexcept; // *NOPAD*
 ```
 
 3-way compares two JSON pointers by lexicographically comparing their sequences of reference tokens: corresponding