USHIFT-2473: add missing quote to microshift-ext template

[dhellmann]

/assign @jogeo

[openshift-ci-robot]

@dhellmann: This pull request references USHIFT-2473 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the bug to target the "4.16.0" version, but no target version was set.

In response to this:

/assign @jogeo

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[openshift-ci]

@dhellmann: all tests passed!

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[jogeo]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dhellmann, jogeo

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• OWNERS [dhellmann,jogeo]

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[ggiguash]

/cherry-pick release-4.15

[openshift-cherrypick-robot]

@ggiguash: #3094 failed to apply on top of branch "release-4.15":

Applying: USHIFT-2473: add missing quote to microshift-ext template
Using index info to reconstruct a base tree...
A	test/image-blueprints/layer4-ext/group1/rhel93_microshift-ext.toml
Falling back to patching base and 3-way merge...
Auto-merging test/image-blueprints/layer3-periodic/group1/rhel93-source.toml
CONFLICT (content): Merge conflict in test/image-blueprints/layer3-periodic/group1/rhel93-source.toml
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 USHIFT-2473: add missing quote to microshift-ext template
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherry-pick release-4.15

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.