wip: update(content): update running docs for Falco 0.34.

[FedeDP]

What type of PR is this?

/kind cleanup
/kind content

Any specific area of the project related to this PR?

/area documentation

What this PR does / why we need it:

Falco 0.34 changed the way we manage our deb/rpm systemd units: falcosecurity/falco#2242.
Update doc accordingly.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

[poiana]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[FedeDP]

Keep this on hold until Falco 0.34.
/hold

[FedeDP]

/cc @leogr

[Andreagit97]

Closed in favor of #799

[FedeDP]

/close
Thank you Andrea!

[poiana]

@FedeDP: Closed this PR.

In response to this:

/close
Thank you Andrea!

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