fix(ui): remove legacy Qt5 font weight tags in autonumberingmanagementw.ui

Qt6's QFont::setWeight() now takes a QFont::Weight enum instead of
a raw int, so uic-generated code from the old <weight>75/50</weight>
XML properties fails to compile (worked on GCC via -fpermissive,
but hard error on Apple Clang for the macOS build).

<bold> is already set on all affected widgets, so <weight> was
redundant and can be dropped without any visual change.

sources/autoNum/ui/autonumberingmanagementw.ui

@@ -141,7 +141,6 @@
      </property>
      <property name="font">
       <font>
-       <weight>75</weight>
        <bold>true</bold>
       </font>
      </property>
@@ -163,7 +162,6 @@
           <widget class="QLabel" name="label_2">
            <property name="font">
             <font>
-             <weight>75</weight>
              <bold>true</bold>
             </font>
            </property>
@@ -238,7 +236,6 @@
           <widget class="QLabel" name="label_3">
            <property name="font">
             <font>
-             <weight>75</weight>
              <bold>true</bold>
             </font>
            </property>
@@ -328,7 +325,6 @@
        <widget class="QWidget" name="folioWidget" native="true">
         <property name="font">
          <font>
-          <weight>50</weight>
           <bold>false</bold>
           <kerning>true</kerning>
          </font>
@@ -338,7 +334,6 @@
           <widget class="QLabel" name="label_4">
            <property name="font">
             <font>
-             <weight>75</weight>
              <bold>true</bold>
             </font>
            </property>