upgrade postgres refrence to 14 (#19416)

Author: fuhrysteve

docs/content/doc/installation/with-docker-rootless.en-us.md

@@ -147,7 +147,7 @@ services:
 +      - db
 +
 +  db:
-+    image: postgres:13
++    image: postgres:14
 +    restart: always
 +    environment:
 +      - POSTGRES_USER=gitea

docs/content/doc/installation/with-docker.en-us.md

@@ -187,7 +187,7 @@ services:
 +      - db
 +
 +  db:
-+    image: postgres:13
++    image: postgres:14
 +    restart: always
 +    environment:
 +      - POSTGRES_USER=gitea

docs/content/doc/installation/with-docker.zh-cn.md

@@ -172,7 +172,7 @@ services:
 +      - db
 +
 +  db:
-+    image: postgres:13
++    image: postgres:14
 +    restart: always
 +    environment:
 +      - POSTGRES_USER=gitea

integrations/README_ZH.md

@@ -36,7 +36,7 @@ TEST_MYSQL_HOST=localhost:3306 TEST_MYSQL_DBNAME=test TEST_MYSQL_USERNAME=root T
 ## 如何使用 pgsql 数据库进行集成测试
 同上，首先在 docker 容器里部署一个 pgsql 数据库
 ```
-docker run -e "POSTGRES_DB=test" -p 5432:5432 --rm --name pgsql postgres:13 #(just ctrl-c to stop db and clean the container) 
+docker run -e "POSTGRES_DB=test" -p 5432:5432 --rm --name pgsql postgres:14 #(just ctrl-c to stop db and clean the container) 
 ```
 之后便可以基于这个数据库进行集成测试
 ```