update textx as per CX

Author: aruntyagiTutu

packages/code-analyzer-regex-engine/src/messages.ts

@@ -44,10 +44,10 @@ const MESSAGE_CATALOG : { [key: string]: string } = {
         `Found trailing whitespace at the end of a line of code.`,
 
     MixedIndentationRuleDescription:
-        `Detects lines where leading indentation contains both spaces and tabs. Mixed indentation can cause unexpected behavior in multiline strings (introduced in Apex API v262) due to how the indentation algorithm processes whitespace.`,
+        `Identifies lines with both spaces and tabs in the leading indentation. Mixed indentation causes unexpected behavior in multiline strings because the indentation algorithm processes whitespace differently.`,
 
     MixedIndentationRuleMessage:
-        `Found mixed spaces and tabs in leading indentation. Use either spaces or tabs consistently for indentation, not both.`,
+        `Leading indentation contains mixed spaces and tabs. To fix this, use either spaces or tabs.`,
 
     AvoidTermsWithImplicitBiasRuleDescription:
         `"Detects usage of terms that reinforce implicit bias.`,