Minor fixes in docs.

Author: alshan

CHANGELOG.md

@@ -20,7 +20,7 @@ to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). All scales should
 
   - `geomYDotplot()`
 
-  See: [example notebook](https://nbviewer.jupyter.org/github/JetBrains/lets-plot-kotlin/blob/master/docs/examples/jupyter-notebooks/geom_dotplot.ipynb).
+  See: [example notebook](https://nbviewer.jupyter.org/github/JetBrains/lets-plot-kotlin/blob/master/docs/examples/jupyter-notebooks/geom_ydotplot.ipynb).
 
 
 - Plot subtitle and caption:

README.md

@@ -260,7 +260,7 @@ Learn more: [GeoTools Support](https://github.com/JetBrains/lets-plot-kotlin/blo
 
   - `geomYDotplot()`
 
-  See: [example notebook](https://nbviewer.jupyter.org/github/JetBrains/lets-plot-kotlin/blob/master/docs/examples/jupyter-notebooks/geom_dotplot.ipynb).
+  See: [example notebook](https://nbviewer.jupyter.org/github/JetBrains/lets-plot-kotlin/blob/master/docs/examples/jupyter-notebooks/geom_ydotplot.ipynb).
 
 - ### Labels and Legends
 

docs/examples.md

@@ -97,7 +97,7 @@ Try the following tutorials and examples to learn and evaluate various features
 
 `coordCartesian(), coordFixed(), coordMap(), coordFlip()`
 
-* [facets.ipynb](https://nbviewer.jupyter.org/github/JetBrains/lets-plot-kotlin/blob/master/docs/examples/jupyter-notebooks/coord_flip.ipynb)
+* [coord_flip.ipynb](https://nbviewer.jupyter.org/github/JetBrains/lets-plot-kotlin/blob/master/docs/examples/jupyter-notebooks/coord_flip.ipynb)
 
 
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