Update source.rst

Currently, version 16 for PG is not supported or available. Testing is still ongoing for that version. Since this is the case. we should not have version 12 or above because that is not accurate. When ver16 is available, we can update the doc to show up to version 16.0 and for future releases.
reference
https://discord.com/channels/678381219515465750/687339658694098958/1173638065911255062

content/administration/install/source.rst

@@ -144,7 +144,7 @@ Odoo requires **Python 3.10** or later to run.
       to download and install Python 3 if needed.
 
 .. note::
-   If Python 3 is already installed, make sure that the version is 3.7 or above, as previous
+   If Python 3 is already installed, make sure that the version is 3.7 Up to 15.0, as previous
    versions are not compatible with Odoo.
 
    .. tabs::
@@ -198,7 +198,7 @@ Odoo uses PostgreSQL as its database management system.
 
    .. group-tab:: Linux
 
-      Use a package manager to download and install PostgreSQL (supported versions: 12.0 or above).
+      Use a package manager to download and install PostgreSQL (supported versions: 12.0 Up to 15.0).
       It can be achieved by executing the following:
 
       .. code-block:: console
@@ -208,12 +208,12 @@ Odoo uses PostgreSQL as its database management system.
    .. group-tab:: Windows
 
       `Download PostgreSQL <https://www.postgresql.org/download/windows>`_ (supported versions: 12.0
-      or above) and install it.
+      Up to 15.0) and install it.
 
    .. group-tab:: Mac OS
 
       Use `Postgres.app <https://postgresapp.com>`_ to download and install PostgreSQL (supported
-      version: 12.0 or above).
+      version: 12.0 Up to 15.0).
 
       .. tip::
          To make the command line tools bundled with Postgres.app available, make sure to set up the