Update README.md

Fixed path syntax.

README.md

@@ -55,7 +55,7 @@ On the PC running the `wifi_rx.grc` flowgraph, open a new terminal. Navigate to
 ## Running a reactive jamming attack on V2Verifier
 To run a reactive jamming attack, you will need a third USRP capable of dual-antenna operation (i.e., with independent antenna chains). We use a USRP N210 + UBX40 daughterboard with dual 5.9 GHz antennas in our experimentation. Note in particular that a USRP B210 will **not** work as the attacker due to the B210's lack of dual antenna chains. You should also have a third PC with Ubuntu 18.04; alternatively, you can run the two devices set up in the steps above off of one PC and have the attacker run on the second. Note that you cannot run the attacker USRP from a PC that is also running one of the other USRPs, as you will replace files that are dependencies for the "normal" operation with modified files specific to the jammer implementation.
 
-On the PC connected to the attacker USRP, configure the PC as described in the installation instructions above. Then, copy the three files in the `gr-ieee80211-files` directory into the `~\gr-ieee802-11\lib` directory, overwriting the files with the same names that are already in that directory. Re-run the build sequence shown above for the gr-ieee802-11 block (`mkdir build`, `cmake ..`, etc.) to rebuild the code for the jammer implementation.
+On the PC connected to the attacker USRP, configure the PC as described in the installation instructions above. Then, copy the three files in the `gr-ieee80211-files` directory into the `~/gr-ieee802-11/lib` directory, overwriting the files with the same names that are already in that directory. Re-run the build sequence shown above for the gr-ieee802-11 block (`mkdir build`, `cmake ..`, etc.) to rebuild the code for the jammer implementation.
 
 Now, open the `reactive_jammer.grc` flowgraph in GNURadio. Run the flowgraph. You may need to restart the program on the non-attacker USRPs if it has run to completion and terminated.