update CHANGELOG

CHANGELOG

@@ -4,4 +4,13 @@
 The functions, tests, and vignettes are fully functional and operational! 
 To do: 
  - conducting installation tests  
- - seeking out beta testers for further evaluation.
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+ - seeking out beta testers for further evaluation.
+
+
+# v1.0.1 : few enhancements
+
+ - The metrics_plot function has been updated to display histograms instead of density plots.
+ - The identity plot's point shape has been modified, enhancing the visual clarity of comparisons between HTRfit and DESeq2 results.
+ - Similar to the identity plot, the dispersion plot also benefits from improved point shape, contributing to a more effective visual analysis.
+ - Add xlab/ylab to ROC plot 
+ - The vignette section now includes a new topic, "About mixed model evaluation".
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