Update 4342-device-limit.md

proposals/4342-device-limit.md

@@ -27,6 +27,7 @@ In comparison to other encrypted apps:
 ### Proposal
 
 The maximum number of devices a user can have at any one time is reduced to 10.
+Servers MAY have an even lower limit than this. Servers MUST NOT have a higher limit than this.
 
 >[!NOTE]
 > 10 was chosen based on a statistical analysis of the matrix.org database:
@@ -77,4 +78,4 @@ The error code is `ORG_MATRIX_MSC4342_M_TOO_MANY_DEVICES` whilst in development.
 
 ### Dependencies
 
-None.
+None.