Remove duplicated renv/sandbox line in gitignore

[Bisaloo]

There seems to be a problem with the # OPTIONAL comment. This PR fixes the detection of the renv/sandbox line and avoid adding it over and over again.

[github-actions]

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🤖 This automated message can help you check the rendered files in your submission for clarity. If you have any questions, please feel free to open an issue in {sandpaper}.

If you have files that automatically render output (e.g. R Markdown), then you should check for the following:

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Rendered Changes

🔍 Inspect the changes: https://github.com/epiverse-trace/research-compendium/compare/md-outputs..md-outputs-PR-35

The following changes were observed in the rendered markdown documents:

 config.yaml (new) |  85 ++++++++++++
 renv.lock (new)   | 397 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 482 insertions(+)

What does this mean?

If you have source files that require output and figures to be generated (e.g. R Markdown), then it is important to make sure the generated figures and output are reproducible.

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⏱️ Updated at 2024-03-04 09:41:36 +0000

[avallecam]

thanks @Bisaloo I'll keep an eye on this for the next monthly update. This is ready to merge 🚀