[backend] Update description for placeholders

[savacano28]

Proposed changes

• Update description for placeholders.
• Test in staging obas: link
  
  

Related issues

• Linked to task in obas Nro 2608

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case (coverage and e2e)
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

Further comments

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 64.31%. Comparing base (9542e94) to head (7b6e0de).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
...form/opencti-graphql/src/modules/xtm/xtm-domain.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #10146   +/-   ##
=======================================
  Coverage   64.30%   64.31%           
=======================================
  Files         656      656           
  Lines       63048    63048           
  Branches     6986     6989    +3     
=======================================
+ Hits        40545    40547    +2     
+ Misses      22503    22501    -2     

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