Update paper.Rmd

vignettes/articles/paper.Rmd

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 options(rmarkdown.html_vignette.check_title = FALSE)
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 <!--Guidance 
 JOSS welcomes submissions from broadly diverse research areas. For this reason, we require that authors include in the paper some sentences that explain the software functionality and domain of use to a non-specialist reader. We also require that authors explain the research applications of the software. The paper should be between 250-1000 words. Authors submitting papers significantly longer than 1000 words may be asked to reduce the length of their paper.
 Your paper should include:
@@ -59,7 +59,7 @@ A list of key references, including to other software addressing related needs.
 Mention (if applicable) a representative set of past or ongoing research projects using the software and recent scholarly publications enabled by it.
 Acknowledgment of any financial support.
 -->
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 # Summary
 
 <!--  A summary describing the high-level functionality and purpose of the software for a diverse, non-specialist audience. -->