feat(Bonus Pagamenti Digitali): [#176426698] Fix format amount

[fabriziofff]

Short description

This pr fixes the wrong format for the cashback amount.

[pagopa-github-bot]

Affected stories

• 🌟 #176426698: [minor] L'importo del cashback visualizzato in ClosedTextualSummary non è formattato correttamente

Generated by 🚫 dangerJS against 507701c

[codecov]

Codecov Report

Merging #2692 (507701c) into master (05aa1fc) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #2692   +/-   ##
=======================================
  Coverage   51.93%   51.93%           
=======================================
  Files         755      755           
  Lines       21261    21262    +1     
  Branches     4039     4039           
=======================================
+ Hits        11041    11042    +1     
  Misses      10176    10176           
  Partials       44       44           

Impacted Files	Coverage Δ
...ts/summary/textualSummary/ClosedTextualSummary.tsx	100.00% <100.00%> (ø)

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