Update README.md

Author: joeflack4

README.md

@@ -232,8 +232,8 @@ this goes inside `~/.data/`, but can be configured following
 If using `SqlImplementation`, some additional steps beyond _general purpose installation_ are required.
 1. Install [`sqlite`](https://www.sqlite.org/download.html)
 2. Install [`relation-graph`](https://github.com/balhoff/relation-graph#installation)
-4. Install [`rdftab`](https://github.com/ontodev/rdftab.rs#installation)
-3. Install `riot`. Can install via [HomeBrew](https://brew.sh/) on MacOS via: `brew install jena` 
+3. Install [`rdftab`](https://github.com/ontodev/rdftab.rs#installation)
+4. Install `riot`. Can install via [HomeBrew](https://brew.sh/) on MacOS via: `brew install jena` 
 
 ## Developer notes