chore: fix some typos

Signed-off-by: teslaedison <qingchengqiushuang@gmail.com>

docs/openapi/index.html

@@ -5,7 +5,7 @@
     <meta charset="utf-8" />
     <link rel="icon" href="/favicon.ico" />
     <title>paopao-ce develop documents</title>
-    <!-- Important: rapi-doc uses utf8 charecters -->
+    <!-- Important: rapi-doc uses utf8 characters -->
     <script
       type="module"
       src="/docs/openapi/assets/rapidoc-min.js"

docs/openapi/openapi.json

@@ -160,7 +160,7 @@
                 "type": "string"
               },
               "in": "header",
-              "description": "A set of `,` seperated content-types that could be sent as a response.\nE.g. `image/png,image/webp,image/gif`",
+              "description": "A set of `,` separated content-types that could be sent as a response.\nE.g. `image/png,image/webp,image/gif`",
               "required": false,
               "deprecated": false
             }