Add version v28 (#564)

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Reviewed-on: https://gitea.com/gitea/docs/pulls/564
Reviewed-by: bircni <[email protected]>
Co-authored-by: Lunny Xiao <[email protected]>

static/swagger-27.json

@@ -17781,6 +17781,9 @@
           "204": {
             "$ref": "#/responses/empty"
           },
+          "403": {
+            "$ref": "#/responses/forbidden"
+          },
           "404": {
             "$ref": "#/responses/notFound"
           },
@@ -17828,6 +17831,9 @@
           "204": {
             "$ref": "#/responses/empty"
           },
+          "403": {
+            "$ref": "#/responses/forbidden"
+          },
           "404": {
             "$ref": "#/responses/notFound"
           },
@@ -25063,7 +25069,6 @@
         "login_name": {
           "description": "identifier of the user, provided by the external authenticator (if configured)",
           "type": "string",
-          "default": "empty",
           "x-go-name": "LoginName"
         },
         "must_change_password": {
@@ -26249,8 +26254,7 @@
       "description": "EditUserOption edit user options",
       "type": "object",
       "required": [
-        "source_id",
-        "login_name"
+        "source_id"
       ],
       "properties": {
         "active": {
@@ -26301,7 +26305,6 @@
         "login_name": {
           "description": "identifier of the user, provided by the external authenticator (if configured)",
           "type": "string",
-          "default": "empty",
           "x-go-name": "LoginName"
         },
         "max_repo_creation": {
@@ -30658,7 +30661,6 @@
         "login_name": {
           "description": "identifier of the user, provided by the external authenticator (if configured)",
           "type": "string",
-          "default": "empty",
           "x-go-name": "LoginName"
         },
         "prohibit_login": {
@@ -32195,4 +32197,4 @@
       "TOTPHeader": []
     }
   ]
-}
+}