simple code mistake

.github/workflows/pkgdown.yaml

@@ -21,7 +21,7 @@ jobs:
       - name: Install pak and query dependencies
         run: |
           install.packages("pak", repos = "https://r-lib.github.io/p/pak/dev/")
-          install.packages("maptools", "maps", "patchwork")
+          install.packages(c("maptools", "maps", "patchwork"))
           saveRDS(pak::pkg_deps("local::.", dependencies = TRUE), ".github/r-depends.rds")
         shell: Rscript {0}