Fix corrupted JSON caused by goccy library (#37214) (#37220)

Backport #37214

The only conflict is go.mod

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

templates/swagger/v1_json.tmpl

@@ -26771,10 +26771,14 @@
       "description": "MergePullRequestForm form for merging Pull Request",
       "type": "object",
       "required": [
-        "Do"
+        "do"
       ],
       "properties": {
-        "Do": {
+        "delete_branch_after_merge": {
+          "type": "boolean",
+          "x-go-name": "DeleteBranchAfterMerge"
+        },
+        "do": {
           "type": "string",
           "enum": [
             "merge",
@@ -26783,20 +26787,8 @@
             "squash",
             "fast-forward-only",
             "manually-merged"
-          ]
-        },
-        "MergeCommitID": {
-          "type": "string"
-        },
-        "MergeMessageField": {
-          "type": "string"
-        },
-        "MergeTitleField": {
-          "type": "string"
-        },
-        "delete_branch_after_merge": {
-          "type": "boolean",
-          "x-go-name": "DeleteBranchAfterMerge"
+          ],
+          "x-go-name": "Do"
         },
         "force_merge": {
           "type": "boolean",
@@ -26806,6 +26798,18 @@
           "type": "string",
           "x-go-name": "HeadCommitID"
         },
+        "merge_commit_id": {
+          "type": "string",
+          "x-go-name": "MergeCommitID"
+        },
+        "merge_message_field": {
+          "type": "string",
+          "x-go-name": "MergeMessageField"
+        },
+        "merge_title_field": {
+          "type": "string",
+          "x-go-name": "MergeTitleField"
+        },
         "merge_when_checks_succeed": {
           "type": "boolean",
           "x-go-name": "MergeWhenChecksSucceed"