Add carboncopy to list (#136)

README.md

@@ -60,6 +60,7 @@ If you made a useful RStudio addin, feel free to make a pull request [on GitHub]
 | blogsnip | Insert Rmd code snippets, especially for {blogdown} | [blogsnip](https://github.com/matt-dray/blogsnip) | :x: | [Matt Dray](https://github.com/matt-dray) | [Demo GIF](https://camo.githubusercontent.com/76ba04c113dd389ea7492e8e05473835f006b8df79eabe4e90446b003d0083e8/68747470733a2f2f7777772e726f737472756d2e626c6f672f706f73742f323031392d31302d32322d626c6f67736e69702d616e2d7273747564696f2d616464696e2d7061636b6167655f66696c65732f626c6f67736e69702e676966) | |
 | Browse RStudio addins | Browse and install RStudio addins | [addinslist](https://github.com/daattali/addinslist) | :white_check_mark: | [Dean Attali](https://deanattali.com/) | [Screenshot](https://raw.githubusercontent.com/daattali/addinslist/master/inst/media/addin.png) | |
 | Build bounding boxes | Draw spatial bounding boxes in a `leaflet` interface | [bbb](https://github.com/baslat/bbb) | :x: | [Abasi Latcham](https://github.com/baslat) | | |
+| carboncopy | Insert `.Last.value` as a datestamped comment | [carboncopy](https://github.com/DesiQuintans/carboncopy) | :x: | [Desi Quintans](https://github.com/DesiQuintans) | [Demo GIF](https://raw.githubusercontent.com/DesiQuintans/carboncopy/main/readme_files/demo_gif.gif) | |
 | Case converter | Convert text cases to lower, upper, snake, camel cases | [caseconverter](https://github.com/strboul/caseconverter) | :x: | [strboul](https://github.com/strboul) | [Demo GIF](https://raw.githubusercontent.com/strboul/caseconverter/master/inst/media/caseconverter.gif) | |
 | Code grip | Reshape R code from long to wide and vice versa | [codegrip](https://github.com/lionel-/codegrip) | :x: | [Lionel Henry](https://github.com/lionel-) | [Demo GIF](https://github.com/lionel-/codegrip/blob/main/man/figures/README/move-reshape.svg) | |
 | Colour picker | Lets you easily select colours | [colourpicker](https://github.com/daattali/colourpicker) | :white_check_mark: | [Dean Attali](https://deanattali.com/) | [Screenshot](https://raw.githubusercontent.com/daattali/colourpicker/master/inst/img/colourpickerscrnshot.png), [Demo video](https://raw.githubusercontent.com/daattali/colourpicker/master/inst/img/colourPickerGadget.gif) | |