style: pre-commit fixes

Author: pre-commit-ci[bot]

include/pybind11/detail/struct_smart_holder.h

@@ -60,7 +60,8 @@ High-level aspects:
 
 // IMPORTANT: This code block must stay BELOW the #include <stdexcept> above.
 // This is only requried on some builds with libc++ (one of three implementations
-// in https://github.com/llvm/llvm-project/blob/a9b64bb3180dab6d28bf800a641f9a9ad54d2c0c/libcxx/include/typeinfo#L271-L276
+// in
+// https://github.com/llvm/llvm-project/blob/a9b64bb3180dab6d28bf800a641f9a9ad54d2c0c/libcxx/include/typeinfo#L271-L276
 // requiere it)
 #if !defined(PYBIND11_EXPORT_GUARDED_DELETE)
 #    if defined(__libcpp_version) && !defined(WIN32) && !defined(_WIN32)