Fix CONTRIBUTORS_QUICK_START Doc (#30549)

Co-authored-by: Tzu-ping Chung <uranusjr@gmail.com>
diff --git a/CONTRIBUTORS_QUICK_START.rst b/CONTRIBUTORS_QUICK_START.rst
index 979b1fb..089216c 100644
--- a/CONTRIBUTORS_QUICK_START.rst
+++ b/CONTRIBUTORS_QUICK_START.rst
@@ -392,15 +392,15 @@
              alt="Accessing local airflow">
       </div>
 
-3. Setup mysql database in
-   MySQL Workbench with Host ``127.0.0.1``, port ``23306``, user ``root`` and password
-   blank(leave empty), default schema ``airflow``.
+3. Setup a PostgreSQL database in your database management tool of choice
+   (e.g. DBeaver, DataGrip) with host ``127.0.0.1``, port ``25433``,
+   user ``postgres``,  password ``airflow``, and default schema ``airflow``.
 
    .. raw:: html
 
       <div align="center" style="padding-bottom:10px">
-        <img src="images/quick_start/mysql_connection.png"
-             alt="Connecting to mysql">
+        <img src="images/quick_start/postgresql_connection.png"
+             alt="Connecting to postgresql">
       </div>
 
 4. Stopping breeze
diff --git a/images/quick_start/mysql_connection.png b/images/quick_start/mysql_connection.png
deleted file mode 100644
index 17615df..0000000
--- a/images/quick_start/mysql_connection.png
+++ /dev/null
Binary files differ
diff --git a/images/quick_start/postgresql_connection.png b/images/quick_start/postgresql_connection.png
new file mode 100644
index 0000000..476a877
--- /dev/null
+++ b/images/quick_start/postgresql_connection.png
Binary files differ