[all hosts] (workflows) Update to use node.js LTS

[ElizabethSamuel-MSFT]

Updated the jobs to use the active LTS version and updated the dependent actions to versions that support the active LTS version. Addresses run warnings.

I did an ad-hoc run of the autogen-docs workflow and found no issues.

[AlexJerabek]

Looks good. Should I change this PR to do the same?
OfficeDev/Office-Add-in-samples#1344

[learn-build-service-prod]

PoliCheck Scan Report

The following report lists PoliCheck issues in PR files. Before you merge the PR, you must fix all severity-1 and severity-2 issues. The AI Review Details column lists suggestions for either removing or replacing the terms. If you find a false positive result, mention it in a PR comment and include this text: #policheck-false-positive. This feedback helps reduce false positives in future scans.

✅ No issues found

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[learn-build-service-prod]

Learn Build status updates of commit 0bfeca9:

✅ Validation status: passed

File	Status	Preview URL	Details
.github/workflows/auto-publish.yml	✅Succeeded
.github/workflows/autogen-docs.yml	✅Succeeded

For more details, please refer to the build report.

[ElizabethSamuel-MSFT]

Looks good. Should I change this PR to do the same? OfficeDev/Office-Add-in-samples#1344

@AlexJerabek I don't think so. I have a PR handling it: OfficeDev/Office-Add-in-samples#1345