fix references

Author: OriolAbril

examples/generalized_linear_models/GLM-robust-with-outlier-detection.ipynb

@@ -2131,7 +2131,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    ":::{include} page_footer.md\n",
+    ":::{include} ../page_footer.md\n",
     ":::"
    ]
   }

examples/references.bib

@@ -43,7 +43,7 @@ @article{gelman2008scaling
   pages={2865--2873},
   year={2008},
   publisher={Wiley Online Library},
-  doi={doi:10.1002/sim.3107}
+  doi={10.1002/sim.3107}
 }
 
 @book{gelman2013bayesian,
@@ -85,7 +85,7 @@ @misc{hogg2010data
 
 @book{ivezić2014astroMLtext,
   author = {Željko Ivezić and Andrew J. Connolly and Jacob T. VanderPlas and Alexander Gray},
-  doi = {doi:10.1515/9781400848911},
+  doi = {10.1515/9781400848911},
   title = {Statistics, Data Mining, and Machine Learning in Astronomy: A Practical Python Guide for the Analysis of Survey Data},
   year = {2014},
   publisher = {Princeton University Press},