Fix typos in README.md

Author: emilk

README.md

@@ -22,12 +22,12 @@ Just type `rerun` and the rerun viewer should show up. Then it is time to run th
 The easiest way to get started is to install [pixi](https://prefix.dev/docs/pixi/overview).
 
 * Start the rerun viewer with `rerun` (see above)
-* Run the example with `rerun run run`
+* Run the example with `pixi run run`
 
 
 ### Manually
 First install the required dependencies:
-* `arrow-cpp`` (required by Rerun)
+* `arrow-cpp` (required by Rerun)
 * `eigen` and `opencv` (required by this example)
 * `cmake` and `ninja` (build tools)