Update argument name for set(long value) (#7405)

Author: nchen000

sdk/metrics/src/main/java/io/opentelemetry/sdk/metrics/SdkDoubleGauge.java

@@ -39,8 +39,8 @@ public void set(double value, Attributes attributes, Context context) {
   }
 
   @Override
-  public void set(double increment) {
-    set(increment, Attributes.empty());
+  public void set(double value) {
+    set(value, Attributes.empty());
   }
 
   static class SdkDoubleGaugeBuilder implements DoubleGaugeBuilder {

sdk/metrics/src/main/java/io/opentelemetry/sdk/metrics/SdkLongGauge.java

@@ -38,8 +38,8 @@ public void set(long value, Attributes attributes, Context context) {
   }
 
   @Override
-  public void set(long increment) {
-    set(increment, Attributes.empty());
+  public void set(long value) {
+    set(value, Attributes.empty());
   }
 
   static class SdkLongGaugeBuilder implements LongGaugeBuilder {