Bug#1536272 - Broken link for flannel configuration on advanced installation page - fixes

[gaurav-nelson]

For https://bugzilla.redhat.com/show_bug.cgi?id=1536272

• fixes a bad link and a formatting issue

[gaurav-nelson]

@bfallonf PTAL 🔹

[bfallonf]

@gaurav-nelson LGTM

[gaurav-nelson]

Thanks @bfallonf 🍔 merging this one.

[gaurav-nelson]

/cherrypick enterprise-3.10

[openshift-cherrypick-robot]

@gaurav-nelson: #7421 failed to apply on top of branch "enterprise-3.10":

error: Failed to merge in the changes.
Using index info to reconstruct a base tree...
A	install_config/install/advanced_install.adoc
Falling back to patching base and 3-way merge...
CONFLICT (modify/delete): install_config/install/advanced_install.adoc deleted in HEAD and modified in fixes a bad link and a formatting issue. Version fixes a bad link and a formatting issue of install_config/install/advanced_install.adoc left in tree.
Patch failed at 0001 fixes a bad link and a formatting issue

Details

In response to this:

/cherrypick enterprise-3.10

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