Fix UCUM codes

Author: jaboehri

src/main/java/dev/dsf/bpe/CodeSystem.java

@@ -194,7 +194,7 @@ public BigDecimal calculateSpeed(long bytes, Duration duration)
 				@Override
 				public String toUcum()
 				{
-					return "Kbit/s";
+					return "kbit/s";
 				}
 			},
 			Mbps
@@ -281,7 +281,7 @@ public BigDecimal calculateSpeed(long bytes, Duration duration)
 				@Override
 				public String toUcum()
 				{
-					return "KBy/s";
+					return "kBy/s";
 				}
 			},
 			MBps

src/main/resources/fhir/ValueSet/dsf-network-speed-units.xml

@@ -27,19 +27,19 @@
                 <code value="bit/s"/>
             </concept>
             <concept>
-                <code value="Kbit/s"/>
+                <code value="kbit/s"/>
             </concept>
             <concept>
                 <code value="Mbit/s"/>
             </concept>
             <concept>
-                <code value="GBit/s"/>
+                <code value="Gbit/s"/>
             </concept>
             <concept>
                 <code value="By/s"/>
             </concept>
             <concept>
-                <code value="KBy/s"/>
+                <code value="kBy/s"/>
             </concept>
             <concept>
                 <code value="MBy/s"/>