Update CHANGES.md for version 4.4 and state this version is broken

CHANGES.md

+2023-03-20 (v4.4)
+-----------------
+
+WARNING: the BOM for this version is not OK (many problem of values of resistors), DO NOT USE.
+    
+  * add variation DEVBOARD, this variation has no PA, there is a MCX connector for TX just after
+    the pre ampli, and a MCX connector for RX before the preampli.
+  * add variation FDDB28 is for band 28 in FDD, this variation has no duplexer
+    on the PCB but has a MCX connector after the PA for TX and a MCX
+    connector for RX. The duplexer will be added outside the PCB.
+
 2023-02-06 (v4.3)
 -----------------