Update some GitHub Actions versions, and enable Dependabot updates

[lcartey]

Description

This PR updates the following Actions to avoid deprecation warnings:

• actions/checkout to v4
• actions/cache to v4
• actions/upload-artifact to v4
• actions/setup-python to v5

It also enables Dependabot Updates for Actions to automate the updates in the future.

Change request type

• Release or process automation (GitHub workflows, internal scripts)
• Internal documentation
• External documentation
• Query files (.ql, .qll, .qls or unit tests)
• External scripts (analysis report or other code shipped as part of a release)

Rules with added or modified queries

• No rules added
• Queries have been added for the following rules:
  • rule number here
• Queries have been modified for the following rules:
  • rule number here

Release change checklist

A change note (development_handbook.md#change-notes) is required for any pull request which modifies:

• The structure or layout of the release artifacts.
• The evaluation performance (memory, execution time) of an existing query.
• The results of an existing query in any circumstance.

If you are only adding new rule queries, a change note is not required.

Author: Is a change note required?

• Yes
• No

🚨🚨🚨
Reviewer: Confirm that format of shared queries (not the .qll file, the
.ql file that imports it) is valid by running them within VS Code.

• Confirmed

Reviewer: Confirm that either a change note is not required or the change note is required and has been added.

• Confirmed

Query development review checklist

For PRs that add new queries or modify existing queries, the following checklist should be completed by both the author and reviewer:

Author

• Have all the relevant rule package description files been checked in?
• Have you verified that the metadata properties of each new query is set appropriately?
• Do all the unit tests contain both "COMPLIANT" and "NON_COMPLIANT" cases?
• Are the alert messages properly formatted and consistent with the style guide?
• Have you run the queries on OpenPilot and verified that the performance and results are acceptable?
  As a rule of thumb, predicates specific to the query should take no more than 1 minute, and for simple queries be under 10 seconds. If this is not the case, this should be highlighted and agreed in the code review process.
• Does the query have an appropriate level of in-query comments/documentation?
• Have you considered/identified possible edge cases?
• Does the query not reinvent features in the standard library?
• Can the query be simplified further (not golfed!)

Reviewer

• Have all the relevant rule package description files been checked in?
• Have you verified that the metadata properties of each new query is set appropriately?
• Do all the unit tests contain both "COMPLIANT" and "NON_COMPLIANT" cases?
• Are the alert messages properly formatted and consistent with the style guide?
• Have you run the queries on OpenPilot and verified that the performance and results are acceptable?
  As a rule of thumb, predicates specific to the query should take no more than 1 minute, and for simple queries be under 10 seconds. If this is not the case, this should be highlighted and agreed in the code review process.
• Does the query have an appropriate level of in-query comments/documentation?
• Have you considered/identified possible edge cases?
• Does the query not reinvent features in the standard library?
• Can the query be simplified further (not golfed!)

Copilot reviewed 5 out of 15 changed files in this pull request and generated no suggestions.

Files not reviewed (10)

• .github/workflows/validate-package-files.yml: Evaluated as low risk
• .github/workflows/prepare-release.yml: Evaluated as low risk
• .github/workflows/verify-standard-library-dependencies.yml: Evaluated as low risk
• .github/workflows/codeql_unit_tests.yml: Evaluated as low risk
• .github/workflows/validate-query-formatting.yml: Evaluated as low risk
• .github/workflows/validate-query-test-case-formatting.yml: Evaluated as low risk
• .github/workflows/validate-query-help.yml: Evaluated as low risk
• .github/workflows/code-scanning-pack-gen.yml: Evaluated as low risk
• .github/workflows/generate-html-docs.yml: Evaluated as low risk
• .github/workflows/update-release.yml: Evaluated as low risk

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[knewbury01]

lgtm!