Merge pull request #30104 from rwgk/fix_merge_accident_pywrapcc

Fix merge accident: Equivalent of pybind/pybind11#5026 applied to pybind11/detail/abi_platform_id.h

Author: rwgk

include/pybind11/detail/abi_platform_id.h

@@ -71,9 +71,9 @@
 /// Classic / Conservative / Progressive cross-module compatibility
 #ifndef PYBIND11_INTERNALS_SH_DEF
 #    if defined(PYBIND11_USE_SMART_HOLDER_AS_DEFAULT)
-#        define PYBIND11_INTERNALS_SH_DEF ""
-#    else
 #        define PYBIND11_INTERNALS_SH_DEF "_sh_def"
+#    else
+#        define PYBIND11_INTERNALS_SH_DEF ""
 #    endif
 #endif