use PySide6-Essentials instead of full install

This reduces the size to 'just' 220mb.

requirements.txt

@@ -1,5 +1,5 @@
 pip==22.2.2
-PySide6==6.3.1
+PySide6-Essentials==6.3.1
 setuptools==65.3.0
 urllib3==1.26.12
 watchdog==2.1.9

src/plugins/krowlog/aboutdialog.py

@@ -68,7 +68,7 @@ class AboutDialog(QDialog):
         dependencies = """
         <ul>
         <li>Ionicons (MIT) - <a href="https://github.com/ionic-team/ionicons">https://github.com/ionic-team/ionicons</a></li>
-        <li>PySide6 {pyside} (LGPL v3) - <a href="https://doc.qt.io/qtforpython-6/">https://doc.qt.io/qtforpython-6/</a></li>
+        <li>PySide6-Essentials {pyside} (LGPL v3) - <a href="https://doc.qt.io/qtforpython-6/">https://doc.qt.io/qtforpython-6/</a></li>
         <li>Qt6 {qt} (LGPL v3) - <a href="https://code.qt.io/cgit/qt/qtbase.git/">https://code.qt.io/cgit/qt/qtbase.git/</a></li>
         <li>urllib3 {urllib3} (MIT) - <a href="https://github.com/urllib3/urllib3">https://github.com/urllib3/urllib3</a></li>
         <li>watchdog {watchdog} (Apache 2.0) - <a href="https://github.com/gorakhargosh/watchdog">https://github.com/gorakhargosh/watchdog</a></li>