small updates to episodes 01 and 02

[hannaheow]

added an instructor note to episode 02 about package installation (lubridate specifically). closes issue #51
also added an instructor note to episode 01 to discuss Rdata settings. closes issue #52

[github-actions]

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🔍 Inspect the changes: https://github.com/carpentries-incubator/better-research-software-r/compare/md-outputs..md-outputs-PR-54

The following changes were observed in the rendered markdown documents:

 01-introduction.md                 |  6 ++++++
 02-better-start-version-control.md | 12 +++++++++++-
 md5sum.txt                         |  5 ++---
 3 files changed, 19 insertions(+), 4 deletions(-)

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⏱️ Updated at 2026-04-28 16:23:53 +0000

[sstevens2]

HI @hannaheow This looks great! I made a couple of suggestions. Let me know what you think and then we can get these merged.

[hannaheow]

thanks @sstevens2 ! I like your suggestions, and I have committed the changes you suggested. I'm going to go ahead and merge this pull request. thanks!