Updated example dataset: cohordata

[davidsantiagoquevedo]

Update of the cohortdata example data set, its description, and all the examples to match the dates of the new data set.

The following tests were also refactored to work correctly with the new data set:

• test-coh_match_utils.R
• test-coh_match_iterate.R
• test-utils_age_group.R

[github-actions]

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[github-actions]

This pull request:

• Adds 0 new dependencies (direct and indirect)
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[github-actions]

This pull request:

• Adds 0 new dependencies (direct and indirect)
• Adds 0 new system dependencies
• Removes 1 existing dependencies (direct and indirect)
• Removes 1 existing system dependencies

(Note that results may be inaccurate if you branched from an outdated version of the target branch.)

[github-actions]

This pull request:

• Adds 0 new dependencies (direct and indirect)
• Adds 0 new system dependencies
• Removes 1 existing dependencies (direct and indirect)
• Removes 1 existing system dependencies

(Note that results may be inaccurate if you branched from an outdated version of the target branch.)