[frontend] Switch steps on agent installation documentation (#1340)

[RomuDeuxfois]

Related issues

• switch steps on agent instalation documentation  #1340

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

If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc...

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 27.98%. Comparing base (2695637) to head (a551ef1).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #1342   +/-   ##
=========================================
  Coverage     27.98%   27.98%           
  Complexity     1282     1282           
=========================================
  Files           520      520           
  Lines         13341    13341           
  Branches        784      784           
=========================================
  Hits           3734     3734           
  Misses         9445     9445           
  Partials        162      162           

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