nx609j: update markdown

- Escape underscores so they
  show up correctly

Change-Id: I2f9d8fced864eaf1d12ceaaec8bafa1323970b2e
diff --git a/_nubia/nubianx609j.markdown b/_nubia/nubianx609j.markdown
index aaa5f4f..669e1e6 100644
--- a/_nubia/nubianx609j.markdown
+++ b/_nubia/nubianx609j.markdown
@@ -63,7 +63,7 @@
 <p class="code">adb reboot bootloader</p>
 <p class="text">You should now be in fastboot mode.</p>
 <p class="text">Your device needs to be unlocked before it can flash custom images. To unlock your device type:</p>
-<p class="code">{{ fastboot }} oem nubia_unlock NUBIA_NX609J</p>
+<p class="code">{{ fastboot }} oem nubia\_unlock NUBIA\_NX609J</p>
 <p class="text">Download the correct image file and copy the file into the same folder as your adb and fastboot binaries. Rename the image to twrp.img and type:</p>
 <p class="code">{{ fastboot }} flash recovery twrp.img</p>
 <p class="text">Choose the "Reboot to recovery" option in bootloader to enter TWRP.</p>
@@ -72,3 +72,7 @@
 </html>
 
 {% include ddinstall.html %}
+r immediately after) choosing this option using a dm-verity disable zip or a root zip like Magisk.</p>
+</html>
+
+{% include ddinstall.html %}