doc/supported-features: Fix SPP version number

The SPP version on the SDP record is actually 0x0102.
diff --git a/doc/supported-features.txt b/doc/supported-features.txt
index 33685d5..f04cf4a 100644
--- a/doc/supported-features.txt
+++ b/doc/supported-features.txt
@@ -14,7 +14,7 @@
 GATT			4.2		Server, Client
 SDAP			1.1		Server, Client
 RFCOMM			1.1		Server, Client
-SPP			1.1		Server, Client
+SPP			1.2		Server, Client
 
 PXP			1.0		Reporter, Monitor
 HOGP			1.0		Host