fix: update error message for HSN validation

[Sanket322]

Support Issue: Support Ticket - 27274

_{Huly®: IC-2996}

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.14%. Comparing base (a8e5490) to head (fff0f1b).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #2869   +/-   ##
========================================
  Coverage    60.14%   60.14%           
========================================
  Files          122      122           
  Lines        12060    12060           
========================================
  Hits          7254     7254           
  Misses        4806     4806           

Files with missing lines	Coverage Δ
...ia_compliance/gst_india/overrides/sales_invoice.py	75.31% <100.00%> (ø)
...dia_compliance/gst_india/utils/transaction_data.py	93.30% <100.00%> (ø)