slic3r: Fix std::regex declaration

FAILED: src/slic3r/CMakeFiles/libslic3r_gui.dir/GUI/CalibrationWizardPresetPage.cpp.o
/usr/bin/c++ -DBOOST_ATOMIC_NO_LIB -DBOOST_CHRONO_NO_LIB -DBOOST_DATE_TIME_NO_LIB -DBOOST_FILESYSTEM_NO_LIB -DBOOST_IOSTREAMS_NO_LIB -DBOOST_LOCALE_NO_LIB -DBOOST_LOG_NO_LIB -DBOOST_REGEX_NO_LIB -DBOOST_SYSTEM_NO_LIB -DBOOST_THREAD_NO_LIB -DCURL_STATICLIB -DGLEW_STATIC -DLIBNEST2D_GEOMETRIES_libslic3r -DLIBNEST2D_OPTIMIZER_nlopt -DLIBNEST2D_STATIC -DLIBNEST2D_THREADING_tbb -DOPENSSL_CERT_OVERRIDE -DOPENVDB_OPENEXR_STATICLIB -DOPENVDB_STATICLIB -DSLIC3R_CURRENTLY_COMPILING_GUI_MODULE -DSLIC3R_GUI -DTBB_USE_CAPTURED_EXCEPTION=0 -DUNICODE -DUSE_TBB -DWXINTL_NO_GETTEXT_MACRO -D_UNICODE -D__WXGTK3__ -D__WXGTK__ -DwxDEBUG_LEVEL=0 -DwxNO_UNSAFE_WXSTRING_CONV -DwxUSE_UNICODE -I/usr/include/dbus-1.0 -I/usr/lib/x86_64-linux-gnu/dbus-1.0/include -I/run/build/BambuStudio/src -I/run/build/BambuStudio/build/src/platform -I/run/build/BambuStudio/src/hidapi/include -I/run/build/BambuStudio/src/slic3r/Utils -I/usr/include/gtk-3.0 -I/usr/include/pango-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/atk-1.0 -I/usr/include/freetype2 -I/usr/include/harfbuzz -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/sysprof-6 -I/usr/include/webp -I/usr/include/libpng16 -I/usr/include/pixman-1 -I/usr/include/at-spi2-atk/2.0 -I/usr/include/at-spi-2.0 -I/usr/include/fribidi -I/usr/include/gio-unix-2.0 -I/usr/include/gstreamer-1.0 -I/run/build/BambuStudio/build/src/libslic3r -I/run/build/BambuStudio/deps/build/destdir/usr/local/include/opencascade -I/run/build/BambuStudio/src/libnest2d/include -I/run/build/BambuStudio/src/miniz -I/run/build/BambuStudio/src/glu-libtess/include -I/run/build/BambuStudio/src/clipper2/Clipper2Lib/include -I/run/build/BambuStudio/src/minilzo -isystem /run/build/BambuStudio/src/eigen -isystem /run/build/BambuStudio/src/libigl -isystem /app/lib/wx/include/gtk3-unicode-static-3.1 -isystem /app/include/wx-3.1 -isystem /run/build/BambuStudio/deps/build/destdir/usr/local/include -isystem /run/build/BambuStudio/deps/build/destdir/usr/local/include/OpenEXR -std=gnu++20 -fext-numeric-literals -Wall -Wno-reorder -pthread -O3 -DNDEBUG -std=gnu++17 -fPIC -fsigned-char -Werror=return-type -Wno-ignored-attributes -Wno-unknown-pragmas -DOPENVDB_ABI_VERSION_NUMBER=8 -MD -MT src/slic3r/CMakeFiles/libslic3r_gui.dir/GUI/CalibrationWizardPresetPage.cpp.o -MF src/slic3r/CMakeFiles/libslic3r_gui.dir/GUI/CalibrationWizardPresetPage.cpp.o.d -o src/slic3r/CMakeFiles/libslic3r_gui.dir/GUI/CalibrationWizardPresetPage.cpp.o -c /run/build/BambuStudio/src/slic3r/GUI/CalibrationWizardPresetPage.cpp
/run/build/BambuStudio/src/slic3r/GUI/CalibrationWizardPresetPage.cpp: In lambda function:
/run/build/BambuStudio/src/slic3r/GUI/CalibrationWizardPresetPage.cpp:321:18: error: ‘regex’ is not a member of ‘std’; did you mean ‘boost::regex’?
  321 |             std::regex decimalRegex(expression);
      |                  ^~~~~

src/slic3r/GUI/CalibrationWizardPresetPage.cpp

@@ -1,3 +1,4 @@
+#include <regex>
 #include "CalibrationWizardPresetPage.hpp"
 #include "I18N.hpp"
 #include "Widgets/Label.hpp"