switch to new output command

this will fix #642

Author: zkamvar

.github/workflows/template.yml

@@ -127,7 +127,7 @@ jobs:
         id: check-rmd
         working-directory: lesson
         run: |
-          echo "::set-output name=count::$(shopt -s nullglob; files=($(find . -iname '*.Rmd')); echo ${#files[@]})"
+          echo "count=$(shopt -s nullglob; files=($(find . -iname '*.Rmd')); echo ${#files[@]})" >> $GITHUB_OUTPUT
 
       - name: Set up R
         if: steps.check-rmd.outputs.count != 0

.github/workflows/website.yml

@@ -44,7 +44,7 @@ jobs:
       - name: Look for R-markdown files
         id: check-rmd
         run: |
-          echo "::set-output name=count::$(shopt -s nullglob; files=($(find . -iname '*.Rmd')); echo ${#files[@]})"
+          echo "count=$(shopt -s nullglob; files=($(find . -iname '*.Rmd')); echo ${#files[@]})" >> $GITHUB_OUTPUT
 
       - name: Set up R
         if: steps.check-rmd.outputs.count != 0