fix typo

vignettes/web/intro.Rmd

@@ -117,7 +117,7 @@ plot(id)
 
 ## Contributing
 
-In order to maximize the package's usefulness for the grid research community, we welcome participation in the package's further development. Experienced R programmers are asked to make pull requests to the [OpenRepGrid github repository](https://github.com/markheckmann/OpenRepGrid), [report issues](https://github.com/markheckmann/OpenRepGrid/issues), or commit code snippets by email. Non-technical oriented researchers without programming knowledge are invited to send us feature requests or suggestions for collaboration, for example, to jointly to develop and implement a new repgrid analysis method. The goal is to make OpeneRepGrid useful for the majority of the repgrid community which will only be possible via research community participation.
+In order to maximize the package's usefulness for the grid research community, we welcome participation in the package's further development. Experienced R programmers are asked to make pull requests to the [OpenRepGrid github repository](https://github.com/markheckmann/OpenRepGrid), [report issues](https://github.com/markheckmann/OpenRepGrid/issues), or commit code snippets by email. Non-technical oriented researchers without programming knowledge are invited to send us feature requests or suggestions for collaboration, for example, to jointly develop and implement a new repgrid analysis method. The goal is to make OpeneRepGrid useful for the majority of the repgrid community which will only be possible via research community participation.
 
 
 ## References