update github actions

Author: ecmerkle

.github/workflows/pkgdown.yaml

@@ -35,7 +35,7 @@ jobs:
       - name: Install dependencies
         run: |
           remotes::install_deps(dependencies = TRUE)
-	  remotes::install_github("r-lib/pillar")
+          remotes::install_github("r-lib/pillar")
           remotes::install_github("yrosseel/lavaan")
           install.packages("pkgdown", type = "binary")
         shell: Rscript {0}