Apply templates to all concepts and tasks to fix double bullets in TOC (#9149)

* Apply concept template to fix double bullet issue.

* Apply concept template

* Apply templates to tasks

content/en/docs/concepts/overview/working-with-objects/labels.md

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 reviewers:
 - mikedanese
 title: Labels and Selectors
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 _Labels_ are key/value pairs that are attached to objects, such as pods.
 Labels are intended to be used to specify identifying attributes of objects that are meaningful and relevant to users, but do not directly imply semantics to the core system.
 Labels can be used to organize and to select subsets of objects.  Labels can be attached to objects at creation time and subsequently added and modified at any time.
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 We'll eventually index and reverse-index labels for efficient queries and watches, use them to sort and group in UIs and CLIs, etc. We don't want to pollute labels with non-identifying, especially large and/or structured, data. Non-identifying information should be recorded using [annotations](/docs/concepts/overview/working-with-objects/annotations/).
 
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 ## Motivation
 
 Labels enable users to map their own organizational structures onto system objects in a loosely coupled fashion, without requiring clients to store these mappings.
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 One use case for selecting over labels is to constrain the set of nodes onto which a pod can schedule.
 See the documentation on [node selection](/docs/concepts/configuration/assign-pod-node/) for more information.
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