Replaced sed with echo for new lines (#3)

.github/scripts/addFrontMatter.sh

@@ -18,7 +18,7 @@ find ${basePath} -type f \( -iname "*.md" ! -iname "*index*" ! -iname "*readme*"
   #frontMatter="${startEnd}\npermalink: /knowledge/${subjectLower}/${titleLower}/\nsubject: ${subject}\ntitle: ${titleSpaces}\nexcerpt: "${excerpt}"\n${startEnd}" # build Liquid Front Matter - builds multiline string
   sed -i "1i ${frontMatter}" "${path}" # prepend the front matter to the head of the file
   # Add new line after end of file
-  sed -i '$a ' "${path}"
+  echo "" >> "${path}"
   # Append breadcrumbs include to the end of the file on a new line and adding a new line to the end of the file
-  sed -i '$a {% include breadcrumbs2.html %}' "${path}"
+  echo "{% include breadcrumbs2.html %}" >> "${path}"
 done