fix: deep_diff typo (#14879)

# Description

Typo introduced a regression failure. Fixes failing tests.

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src/libslic3r/Preset.cpp

@@ -3504,7 +3504,7 @@ inline t_config_option_keys deep_diff(const ConfigBase &config_this, const Confi
         if (this_opt != nullptr && other_opt != nullptr && *this_opt != *other_opt)
         {
             //BBS: add bed_exclude_area
-            if (opt_key == "printable_area" || opt_key == "bed_exclude_area" || opt_key == "compatible_prints" || opt_key == "compatible_printers" || opt_key == "thumbnails" ||  opt_key == "wrapping_exclude_area", "slicing_pipeline_plugin") {
+            if (opt_key == "printable_area" || opt_key == "bed_exclude_area" || opt_key == "compatible_prints" || opt_key == "compatible_printers" || opt_key == "thumbnails" ||  opt_key == "wrapping_exclude_area" || opt_key == "slicing_pipeline_plugin") {
                 // Scalar variable, or a vector variable, which is independent from number of extruders,
                 // thus the vector is presented to the user as a single input.
                 diff.emplace_back(opt_key);