Update PowerShell syntax colors in dark theme

Changed the color values for Keywords2 and Keywords3 in the PowerShell.xshd dark theme file to use specific hex codes instead of named colors for improved consistency and appearance.

Author: emako

QuickLook.Plugin/QuickLook.Plugin.TextViewer/Syntax/Dark/PowerShell.xshd

@@ -93,7 +93,7 @@
                 <Key word="workflow"/>
             </KeyWords>
 
-            <KeyWords name="Keywords2" color="Purple" bold="false" italic="false">
+            <KeyWords name="Keywords2" color="#D8A0DF" bold="false" italic="false">
                 <Key word="Add-Computer"/>
                 <Key word="Add-Content"/>
                 <Key word="Add-History"/>
@@ -439,7 +439,7 @@
                 <Key word="Write-Zip"/>
             </KeyWords>
 
-            <KeyWords name="Keywords3" color="Teal" bold="false" italic="false">
+            <KeyWords name="Keywords3" color="#80CBC4" bold="false" italic="false">
                 <Key word="ac"/>
                 <Key word="asnp"/>
                 <Key word="cat"/>