[FIX] theme_avantgarde: s_carousel text contrast

The `o_cc3` is rendering a white color depending on the the palette.
Using `o_cc5` ensure a white text on most palettes.

task-4381722

closes #1021

Signed-off-by: Christopher du Toit (chto) <[email protected]>

Author: mano-odoo

theme_avantgarde/views/customizations.xml

@@ -280,14 +280,8 @@
     <xpath expr="//div[hasclass('carousel-indicators')]" position="attributes">
         <attribute name="class" add="s_carousel_indicators_dots" separator=" "/>
     </xpath>
-    <xpath expr="//div[hasclass('carousel-item')]" position="attributes">
-        <attribute name="class" add="o_cc3" remove="o_cc5" separator=" "/>
-    </xpath>
     <xpath expr="(//div[hasclass('carousel-item')])[2]" position="attributes">
-        <attribute name="class" add="o_cc o_cc3" separator=" "/>
-    </xpath>
-    <xpath expr="(//div[hasclass('carousel-item')])[3]" position="attributes">
-        <attribute name="class" add="o_cc3" remove="o_cc5" separator=" "/>
+        <attribute name="class" add="o_cc o_cc5" separator=" "/>
     </xpath>
     <xpath expr="//div[hasclass('carousel-item')]//div[hasclass('o_we_bg_filter')]" position="replace">
         <div class="o_we_bg_filter bg-black-50"/>