Fix typo in 'agent' role

[febrezo]

Proposed changes

• A minor change in the usage of the term agent which has a typo without the initial a

Related issues

N/A

Checklist

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

Further comments

Note that the behaviour for systems that may be using the old gent term has not been tested. I'm not technically capable of addressing to what extent the DB consistency might be an issue here.

[codecov]

Codecov Report

Base: 71.75% // Head: 71.76% // Increases project coverage by +0.01% 🎉

Coverage data is based on head (3952745) compared to base (f267f8d).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2364      +/-   ##
==========================================
+ Coverage   71.75%   71.76%   +0.01%     
==========================================
  Files         236      236              
  Lines       15082    15082              
  Branches     2445     2445              
==========================================
+ Hits        10822    10824       +2     
+ Misses       3694     3692       -2     
  Partials      566      566              

Impacted Files	Coverage Δ
...tform/opencti-graphql/src/graphql/sseMiddleware.js	61.24% <0.00%> (+0.42%)	⬆️

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