docs: added an upgrade guide for v1.7.1 (#2868)

* docs: added an upgrade guide for 1.7.1

* docs: added more required changes for the release

* docs: removed link to payment provider docs

* docs: reordered upgrade guides in desc order

* added export to code snippet

* added details about update_request property

* fixed the text

* added link to scheduled jobs docs

www/docs/sidebars.js

@@ -176,18 +176,13 @@ module.exports = {
           items: [
             {
               type: "doc",
-              id: "advanced/backend/upgrade-guides/1-3-0",
-              label: "v1.3.0"
+              id: "advanced/backend/upgrade-guides/1-7-1",
+              label: "v1.7.1"
             },
             {
               type: "doc",
-              id: "advanced/backend/upgrade-guides/1-3-6",
-              label: "v1.3.6"
-            },
-            {
-              type: "doc",
-              id: "advanced/backend/upgrade-guides/1-3-8",
-              label: "v1.3.8"
+              id: "advanced/backend/upgrade-guides/1-7-0",
+              label: "v1.7.0"
             },
             {
               type: "doc",
@@ -196,8 +191,18 @@ module.exports = {
             },
             {
               type: "doc",
-              id: "advanced/backend/upgrade-guides/1-7-0",
-              label: "v1.7.0"
+              id: "advanced/backend/upgrade-guides/1-3-8",
+              label: "v1.3.8"
+            },
+            {
+              type: "doc",
+              id: "advanced/backend/upgrade-guides/1-3-6",
+              label: "v1.3.6"
+            },
+            {
+              type: "doc",
+              id: "advanced/backend/upgrade-guides/1-3-0",
+              label: "v1.3.0"
             },
             {
               type: "doc",