:art: use Clang-Format

.github/workflows/check_amalgamation.yml

diff --git a/.github/workflows/check_amalgamation.yml b/.github/workflows/check_amalgamation.yml
index 88651f7..3054c6d 100644
--- a/.github/workflows/check_amalgamation.yml
+++ b/.github/workflows/check_amalgamation.yml
@@ -21,6 +21,7 @@
 
   check:
     runs-on: ubuntu-latest
+    container: silkeh/clang:dev
     env:
       MAIN_DIR: ${{ github.workspace }}/main
 

single_include/nlohmann/json.hpp

diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 5719c72..1ac7c07 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -4241,7 +4241,7 @@
 @since version 1.0.0
 */
 #if JSON_HAS_THREE_WAY_COMPARISON
-inline std::partial_ordering operator<= > (const value_t lhs, const value_t rhs) noexcept  // *NOPAD*
+inline std::partial_ordering operator<=> (const value_t lhs, const value_t rhs) noexcept  // *NOPAD*
 #else
 inline bool operator<(const value_t lhs, const value_t rhs) noexcept
 #endif