Updating a slight typo ("notag" to "notags") in all release cheat sheets

i.e-

old: 

release-file-no-tag    https://infra.tekton.dev/tekton-releases/pruner/previous/v0.3.4/release.notag.yaml

new:

release-file-no-tag    https://infra.tekton.dev/tekton-releases/pruner/previous/v0.3.4/release.notags.yaml

and the same fix for release-pipeline

old:
echo "${BASE_URL}/release.notag.yaml" > $(results.release-no-tag.path)

new:
echo "${BASE_URL}/release.notags.yaml" > $(results.release-no-tag.path)

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Change shall be made in the following component: 

• pruner
• chains
• pipeline
• operator
• triggers