fix typo

.github/workflows/pkg-maintenance.yaml

@@ -9,4 +9,4 @@ jobs:
   auto-pkg-maintenance:
     uses: rstudio/education-workflows/.github/workflows/auto-pkg-maintenance.yaml@v1
     with:
-      extra-pacakges: any::showtext, any::sysfonts, any::ggplot2
+      extra-packages: any::showtext, any::sysfonts, any::ggplot2