fix: modified tick labels to read mpl ticks labels not positions

src/mplhep/plot.py

@@ -545,7 +545,7 @@ def iterable_not_string(arg):
             )
 
     elif flow == "show" and (underflow > 0.0 or overflow > 0.0):
-        xticks = ax.get_xticks().tolist()
+        xticks = [label.get_text() for label in ax.get_xticklabels()]
         lw = ax.spines["bottom"].get_linewidth()
         _edges = plottables[0].edges
         _centers = plottables[0].centers
@@ -556,6 +556,7 @@ def iterable_not_string(arg):
         if underflow > 0.0:
             xticks[0] = ""
             xticks[1] = f"<{flow_bins[2]}"
+            ax.set_xticks(ax.get_xticks())
             ax.set_xticklabels(xticks)
 
             ax.plot(
@@ -582,6 +583,7 @@ def iterable_not_string(arg):
         if overflow > 0.0:
             xticks[-1] = ""
             xticks[-2] = f">{flow_bins[-3]}"
+            ax.set_xticks(ax.get_xticks())
             ax.set_xticklabels(xticks)
             ax.plot(
                 [_edges[-2], _edges[-1]],