Add JuliaCon presentation

CITATION.bib

@@ -1,12 +1,9 @@
-@software{legat2021multivariatepolynomials,
-  author       = {Benoît Legat and
-                  Sascha Timme and
-                  Robin Deits},
-  title        = {JuliaAlgebra/MultivariatePolynomials.jl: v0.3.18},
+@software{legat2023multivariate,
+  author       = {Legat, Beno{\^\i}t},
+  title        = {Multivariate polynomials in Julia},
   month        = jul,
-  year         = 2021,
-  publisher    = {Zenodo},
-  version      = {v0.3.18},
-  doi          = {10.5281/zenodo.5083796},
-  url          = {https://doi.org/10.5281/zenodo.5083796}
+  year         = 2023,
+  booktitle    = {JuliaCon},
+  year         = {2022},
+  url          = {https://pretalx.com/juliacon-2022/talk/TRFSJY/},
 }

README.md

@@ -17,6 +17,11 @@ The interface contains functions for accessing the coefficients, monomials, term
 - [**STABLE**][docs-stable-url] — **most recently tagged version of the documentation.**
 - [**LATEST**][docs-latest-url] — *in-development version of the documentation.*
 
+## Citing
+
+Please cite the [JuliaCon 2022 presentation](https://pretalx.com/juliacon-2022/talk/TRFSJY/) [[Slides](https://drive.google.com/file/d/1q9UT5rpcmm0GdRmWm7llhVpbOx7OxGnZ/view)].
+See [CITATION.bib](https://github.com/JuliaPolyhedra/MultivariatePolynomials.jl/blob/master/CITATION.bib) for the BibTeX.
+
 ## Examples
 
 Below is a simple usage example