[FIX] doc: typo in install document

Closes #12402

doc/setup/install.rst

@@ -174,7 +174,7 @@ Or ``dpkg`` (handles less dependencies automatically):
     # apt-get install postgresql -y
     # dpkg -i <path_to_installation_package> # this probably fails with missing dependencies
     # apt-get install -f # should install the missing dependencies
-    # pdkg -i <path_to_installation_package>
+    # dpkg -i <path_to_installation_package>
 
 
 This will install Odoo as a service, create the necessary PostgreSQL_ user