Add link to Provisioning guide in the "Creating a host" procedure

[rh-max]

What changes are you introducing?

Adding a link to Provisioning guide in the "Creating a host" procedure -- the general procedure is helpful but insufficient.

Why are you introducing these changes? (Explanation, links to references, issues, etc.)

https://issues.redhat.com/browse/SAT-28626

Anything else to add? (Considerations, potential downsides, alternative solutions you have explored, etc.)

Checklists

• [x] I am okay with my commits getting squashed when you merge this PR.
• [x] I am familiar with the contributing guidelines.

Please cherry-pick my commits into:

• [x] Foreman 3.13/Katello 4.15 (Satellite 6.17)
• [x] Foreman 3.12/Katello 4.14 (Satellite 6.16)
• [x] Foreman 3.11/Katello 4.13 (orcharhino 6.11 on EL8 only)
• [x] Foreman 3.10/Katello 4.12
• [x] Foreman 3.9/Katello 4.11 (Satellite 6.15; orcharhino 6.8/6.9/6.10)
• [x] Foreman 3.8/Katello 4.10
• [x] Foreman 3.7/Katello 4.9 (Satellite 6.14)
• [x] Foreman 3.6/Katello 4.8
• [x] Foreman 3.5/Katello 4.7 (Satellite 6.13; orcharhino 6.6/6.7)
• We do not accept PRs for Foreman older than 3.5.

[github-actions[bot]]

The PR preview for 87b95a1126e1ebc2255483d912ef80303359a4ee is available at theforeman-foreman-documentation-preview-pr-3443.surge.sh

The following output files are affected by this PR:

• Managing_Hosts/index-foreman-el.html
• Managing_Hosts/index-katello.html
• Managing_Hosts/index-orcharhino.html
• Managing_Hosts/index-satellite.html

show diff

show diff as HTML

[rh-max]

@Lennonka If this LGTY now, could you please merge this? Thanks.