fix(styles): update punctuation in Aura Theme to meet style guidelines (#1184)

### Description

- Updates Aura Theme variants to align punctuation colors to theme's
style guide

Author: arrrgi

styles/aura-theme-dark-soft.xml

@@ -101,7 +101,7 @@
   <entry type="GenericTraceback" style="#c55858"/>
 
   <!-- Punctuation -->
-  <entry type="Punctuation" style="#bdbdbd"/>
+  <entry type="Punctuation" style="#c17ac8"/>
   <entry type="Text" style="#bdbdbd"/>
   <entry type="TextWhitespace" style="#bdbdbd"/>
 </style>

styles/aura-theme-dark.xml

@@ -101,7 +101,7 @@
   <entry type="GenericTraceback" style="#ff6767"/>
 
   <!-- Punctuation -->
-  <entry type="Punctuation" style="#edecee"/>
+  <entry type="Punctuation" style="#f694ff"/>
   <entry type="Text" style="#edecee"/>
   <entry type="TextWhitespace" style="#edecee"/>
 </style>