docs(slides): update slides since they weren't needed after this course

slides/introduction.qmd

@@ -12,8 +12,6 @@ csl: includes/vancouver.csl
 -   :heavy_check_mark: Pick a group from the basket and go to that table
 -   :heavy_check_mark: Introduce yourself
 -   :heavy_check_mark: Open your `LearnR3.Rproj` RStudio project
--   :heavy_check_mark: Re-install r3 with `pak::pak("rostools/r3")`
--   :heavy_check_mark: Re-run `r3::install_packages_intermediate()`
 -   :heavy_check_mark: Check that your `data-raw/` looks like that on
     the right
 :::
@@ -147,14 +145,21 @@ material and in how we teach you. What makes sense, what is confusing,
 and so on.
 :::
 
-## Getting or asking for help :raising_hand_woman::raising_hand_man: {.smaller}
+## Getting or asking for help :raising_hand_woman::raising_hand_man: {.center}
 
+::: columns
+::: column
 -   Put the origami hat on your laptop to get help
     -   There are lots of helpers
-    -   Team members, help out too
+    -   Table mates, you can help out too
+:::
+
+::: column
 -   We're all learning here!
     -   This is a supportive and safe environment
     -   Remember our [Code of Conduct](conduct.html)
+:::
+:::
 
 ## Practice using origami hats: Does your `data-raw/` look as this? {.center}