Update clirr ignored differences

Author: sakthivelmanii

google-cloud-spanner/clirr-ignored-differences.xml

@@ -1011,21 +1011,21 @@
   <difference>
     <differenceType>7012</differenceType>
     <className>com/google/cloud/spanner/StructReader</className>
-    <method>java.lang.Object getOrNull(int, java.util.function.Function)</method>
+    <method>java.lang.Object getOrNull(int, java.util.function.BiFunction)</method>
   </difference>
   <difference>
     <differenceType>7012</differenceType>
     <className>com/google/cloud/spanner/StructReader</className>
-    <method>java.lang.Object getOrNull(java.lang.String, java.util.function.Function)</method>
+    <method>java.lang.Object getOrNull(java.lang.String, java.util.function.BiFunction)</method>
   </difference>
   <difference>
     <differenceType>7012</differenceType>
     <className>com/google/cloud/spanner/StructReader</className>
-    <method>java.lang.Object getOrDefault(int, java.util.function.Function, java.lang.Object)</method>
+    <method>java.lang.Object getOrDefault(int, java.util.function.BiFunction, java.lang.Object)</method>
   </difference>
   <difference>
     <differenceType>7012</differenceType>
     <className>com/google/cloud/spanner/StructReader</className>
-    <method>java.lang.Object getOrDefault(java.lang.String, java.util.function.Function, java.lang.Object)</method>
+    <method>java.lang.Object getOrDefault(java.lang.String, java.util.function.BiFunction, java.lang.Object)</method>
   </difference>
 </differences>