feat(tester): add UpdateContest endpoint

tester/v1/openapi.yaml

@@ -163,6 +163,26 @@ paths:
       responses:
         "200":
           description: OK
+    patch:
+      operationId: UpdateContest
+      security:
+        - bearerAuth: [ ]
+      parameters:
+        - name: id
+          in: path
+          required: true
+          schema:
+            type: integer
+            format: int32
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/UpdateContestRequest'
+      responses:
+        "200":
+          description: OK
   /contests/tasks:
     post:
       operationId: AddTask
@@ -616,6 +636,11 @@ components:
         time_limit:
           type: integer
           format: int32
+    UpdateContestRequest:
+      type: object
+      properties:
+        title:
+          type: string
   securitySchemes:
     bearerAuth:
       type: http