Add missing default female hair texture for Ruth avatar.

This was not in library assets despite being referred to in assets/BodyPartsAssetSet/base_hair.dat
Texture ID is 7ca39b4c-bd19-4699-aff7-f93fd03d3e7b
Taken from https://github.com/openmetaversefoundation/simiangrid/blob/master/Grid/default_assets/Default%20Female%20Hair-7ca39b4c-bd19-4699-aff7-f93fd03d3e7b.j2c

bin/assets/TexturesAssetSet/TexturesAssetSet.xml

@@ -343,6 +343,12 @@
     <Key Name="assetType" Value="0" />
     <Key Name="fileName" Value="femaleface.jp2"/>
   </Section>
+  <Section Name="Female Hair Texture">
+    <Key Name="assetID" Value="7ca39b4c-bd19-4699-aff7-f93fd03d3e7b"/>
+    <Key Name="name" Value="Female Hair Texture"/>
+    <Key Name="assetType" Value="0" />
+    <Key Name="fileName" Value="femalehair.jp2"/>
+  </Section>
   <Section Name="Hyperlink Map Texture">
     <Key Name="assetID" Value="00000000-0000-1111-9999-000000000013"/>
     <Key Name="name" Value="Hyperlink Map Texture"/>