added custom block footer social net work

config/sync/structure_sync.data.yml

@@ -47,3 +47,18 @@ menus:
     weight: '0'
     langcode: fr
     uuid: 7249712f-fe65-40d3-a8ee-8047420bc88a
+log: 1
+blocks:
+  -
+    info: 'Retrouvez-nous sur les réseaux sociaux :'
+    langcode: fr
+    uuid: e0c66a5a-bc7a-4f4a-b6f1-7bec4b77ad78
+    bundle: custom
+    revision_id: null
+    rev_id_current: null
+    fields:
+      body:
+        -
+          value: "<p><a href=\"https://twitter.com\">https://twitter.com</a></p>\r\n\r\n<p><a href=\"https://fr.linkedin.com/\">https://fr.linkedin.com/</a></p>\r\n\r\n<p><a href=\"https://youtube.fr\">https://youtube.fr</a></p>\r\n"
+          summary: ''
+          format: wysiwyg