change ggtitle(), xlab() and ylab() for labs()

[alwil]

@cforgaci , @javisanmillan - I have made one small change in the 4th episode regarding the adding title and such. I think it's a better approach. we can leave the merge for after the workshop, but I think we should already include this in the workshop.

[github-actions]

Thank you!

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🔍 Inspect the changes: https://github.com/carpentries-incubator/r-geospatial-urban/compare/md-outputs..md-outputs-PR-76

The following changes were observed in the rendered markdown documents:

 04-intro-to-visualisation.md                       |  10 ++--
 18-import-and-visualise-osm-data.md                |   4 +-
 ...o-to-visualisation-rendered-ggplot-titles-1.png | Bin 10618 -> 10802 bytes
 md5sum.txt                                         |  54 ++++++++++-----------
 4 files changed, 35 insertions(+), 33 deletions(-)

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⏱️ Updated at 2025-02-05 11:49:22 +0000