Update removerfi.md

Author: hannahumansky

_posts/tutorials/removerfi.md

@@ -67,7 +67,7 @@ This command will bring up two PGPLOT windows, shown below:
 
 The window with three graphs displays: 1) the pulse profile, 2) frequency vs. pulse phase, 3) time vs. pulse phase. As we eliminate RFI, the pulse profile should become more defined. 
 
-![pgplots](https://pulsar-observers.github.com/assets/img/pgplot1.PNG)
+![pgplots](https://github.com/pulsar-observers/pulsar-observers.github.io/blob/master/assets/img/pgplot1.PNG)
 
 
 The other window with a single plot displays the data as a visual array of the data, organized by frequency and sub-integration index. We will be working with this plot to visually eliminate the RFI in our data. Bright spots in the data represent RFI, which we want to eliminate. Each time a pixel of RFI is eliminated, the plot will recalibrate its display values.