Update dependency gitlab-ci-utils/gitlab-ci-templates to v15.2.2

This MR contains the following updates:

Package	Type	Update	Change
gitlab-ci-utils/gitlab-ci-templates	repository	minor	15.1.0 -> 15.2.2

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Release Notes

gitlab-ci-utils/gitlab-ci-templates

v15.2.2

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Fixed

• Updated pagean and lint_pageanrc jobs to pagean@8.0.4.

Miscellaneous

• Update renovate config to not pin digests for node and docker images. (#​223)

v15.2.1

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Fixed

• Fixed syntax error in lint_pageanrc job. (#​222)

v15.2.0

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Changed

• Added lint_pageanrc job to lint a .pageanrc.json file. This is available as a separate job, and is included with the pagean job. (#​221)
• Updated pagean job to accept a variable PAGEANRC_FILE with the Pagean config file location (which defaults to .pageanrc.json). (#​221)
• Updated node_sbom job to upload a cyclonedx report. (#​220)

Fixed

• Updated pa11y_ci job to gitlab-pa11y-ci:7.0.3.
• Updated lint_lockfile job to lockfile-lint@4.10.1.
• Updated node_sbom job to cyclonedx-npm@1.8.0.
• Updated lint_nunjucks job and .djlint template to djlint@1.19.14.
• Updated .python based jobs to use python v3.11.2.

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