Typo "Flexible server"→"Flexible Server"

https://learn.microsoft.com/en-us/azure/postgresql/flexible-server/concepts-major-version-upgrade
https://github.com/MicrosoftDocs/azure-docs/blob/main/articles/postgresql/flexible-server/concepts-major-version-upgrade.md
#PingMSFTDocs

Author: hyoshioka0128

articles/postgresql/flexible-server/concepts-major-version-upgrade.md

@@ -19,7 +19,7 @@ ms.topic: conceptual
 > Major Version Upgrade for PostgreSQL Flexible Server is currently in preview.
 
 ## Overview
-Azure Database for PostgreSQL Flexible server supports PostgreSQL versions 11, 12, 13, 14 and 15(preview). Postgres community releases a new major version containing new features about once a year. Additionally, major version receives periodic bug fixes in the form of minor releases. Minor version upgrades include changes that are backward-compatible with existing applications. Azure Database for PostgreSQL Flexible service periodically updates the minor versions during customer’s maintenance window. Major version upgrades are more complicated than minor version upgrades as they can include internal changes and new features that may not be backward-compatible with existing applications. 
+Azure Database for PostgreSQL Flexible Server supports PostgreSQL versions 11, 12, 13, 14 and 15(preview). Postgres community releases a new major version containing new features about once a year. Additionally, major version receives periodic bug fixes in the form of minor releases. Minor version upgrades include changes that are backward-compatible with existing applications. Azure Database for PostgreSQL Flexible Service periodically updates the minor versions during customer’s maintenance window. Major version upgrades are more complicated than minor version upgrades as they can include internal changes and new features that may not be backward-compatible with existing applications. 
 
 Azure Database for PostgreSQL Flexible Server Postgres has now introduced in-place major version upgrade feature that performs an in-place upgrade of the server with just a click. In-place major version upgrade simplifies the upgrade process minimizing the disruption to users and applications accessing the server. In-place upgrades are a simpler way to upgrade the major version of the instance, as they retain the server name and other settings of the current server after the upgrade, and don't require data migration or changes to the application connection strings. In-place upgrades are faster and involve shorter downtime than data migration. 
 
@@ -38,7 +38,7 @@ Here are some of the important considerations with in-place major version upgrad
 
 -	Most extensions are automatically upgraded to higher versions during an in-place major version upgrade, with some exceptions. Refer **limitations** section for more details. 
 
--	In-place major version upgrade process for Flexible server automatically deploys the latest supported minor version. 
+-	In-place major version upgrade process for Flexible Server automatically deploys the latest supported minor version. 
 
 -	In-place major version upgrade process is an offline operation and it involves a short downtime.  
 
@@ -121,7 +121,7 @@ It's recommended to perform a dry run of the in-place major version upgrade in a
 
 
 
-:::image type="content" source="media/concepts-major-version-upgrade/upgrade-verification.png" alt-text="Diagram of Upgraded version to Flexible server after major version upgrade.":::
+:::image type="content" source="media/concepts-major-version-upgrade/upgrade-verification.png" alt-text="Diagram of Upgraded version to Flexible Server after major version upgrade.":::
 
 
 ## Post Upgrade