Update CHANGELOG.md with the change from diagCorr to diagMetric

CHANGELOG.md

@@ -34,7 +34,7 @@
 \* Change name of `virtMicGeo()` to `vMicGeo()`. This **breaks** backward compatibility.
 
 **Utilities - Generic**\
-\+ Added the function `diagCorr()` to calculate the correlation coefficient of a matrix to a diagonal matrix. In practice this provides a metric to measure the "diagonality" of a matrix. 
+\+ Added the function `diagMetric()` to calculate a metric to measure the "diagonality" of a matrix. 
 
 **Virtual Sensing - Remote Microphone Technique**\
 \* Parallelise the for-loops in `obsFiltEst()`. While execution may be slower for a small number of sources and receiver positions, the overall execution time will not increase significantly due to the functions' generally fast performance.\