fix mutation name for last two rows in standardised single mutation data

standardised-data-single-mutation.csv

@@ -19,5 +19,5 @@ ID-017,Line-B,12/12/2025,ID-F10,ID-M11,End of experiment,1,Mut-B,wt,wt,het
 ID-018,Line-B,18/12/2025,ID-F11,ID-M12,End of experiment,1,Mut-B,het,wt,hom
 ID-019,Line-B,01/12/2025,ID-F11,ID-M12,End of experiment,1,Mut-B,het,wt,hom
 ID-020,Line-B,01/12/2025,ID-F11,ID-M12,End of experiment,1,Mut-B,het,wt,hom
-ID-021,Line-C,01/12/2025,ID-F11,ID-M12,End of experiment,1,Mut-B,het,wt,hom
-ID-022,Line-C,01/12/2025,ID-F11,ID-M12,End of experiment,1,Mut-B,het,wt,hom
+ID-021,Line-C,01/12/2025,ID-F11,ID-M12,End of experiment,1,Mut-C,het,wt,hom
+ID-022,Line-C,01/12/2025,ID-F11,ID-M12,End of experiment,1,Mut-C,het,wt,hom