doc: fix Search-FullOverview.ipynb code example

[bernhardreiter]

No description provided.

[coveralls]

Coverage remained the same at 35.252% when pulling 620ab91 on bernhardreiter:patch-1 into eabc648 on MISP:master.

[codecov]

Codecov Report

Merging #527 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #527   +/-   ##
=======================================
  Coverage   35.31%   35.31%           
=======================================
  Files          35       35           
  Lines        6790     6790           
=======================================
  Hits         2398     2398           
  Misses       4392     4392

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[Rafiot]

Thanks!