fix JSON

Author: juliodialpad

.github/workflows/send-blog-communications.yml

@@ -113,7 +113,7 @@ jobs:
           -H "Content-Type: application/json" \
           -d '{
             "to": "${{ env.TO_MAIL }}"
-            "subject": "[dialtone] New blog post: '${{ env.BLOG_POST_HEADING }}'",
+            "subject": "[dialtone] New blog post: \'${{ env.BLOG_POST_HEADING }}\'",
             "message": "New blog post: \"${{ env.BLOG_POST_HEADING }}\". Read full article: ${{ env.POST_URL }}"
           }'