Fix typos in subsection "6.3.2 How does pivoting work?" (#1534)

* Add missing word

* Fix typo

data-tidy.qmd

@@ -279,19 +279,19 @@ df |>
 
 How does the reshaping work?
 It's easier to see if we think about it column by column.
-As shown in @fig-pivot-variables, the values in column that was already a variable in the original dataset (`id`) need to be repeated, once for each column that is pivoted.
+As shown in @fig-pivot-variables, the values in a column that was already a variable in the original dataset (`id`) need to be repeated, once for each column that is pivoted.
 
 ```{r}
 #| label: fig-pivot-variables
 #| echo: false
 #| fig-cap: | 
 #| Columns that are already variables need to be repeated, once for
-#| each column that is pivotted.
+#| each column that is pivoted.
 #| fig-alt: | 
 #| A diagram showing how `pivot_longer()` transforms a simple
 #| dataset, using color to highlight how the values in the `id` column
 #| ("A", "B", "C") are each repeated twice in the output because there are
-#| two columns being pivotted ("bp1" and "bp2").
+#| two columns being pivoted ("bp1" and "bp2").
 
 knitr::include_graphics("diagrams/tidy-data/variables.png", dpi = 270)
 ```