Remove space for word "backup"

.github/ISSUE_TEMPLATE.md

@@ -37,6 +37,6 @@ Run `zcashd --version` to find out
 This includes the relevant contents of `~/.zcash/debug.log`. You can paste raw text, attach the file directly in the issue or link to the text via a pastebin type site.
 Please also include any non-standard things you did during compilation (extra flags, dependency version changes etc.) if applicable.
 
-### Do you have a back up of `~/.zcash` directory and/or take a VM snapshot?
+### Do you have a backup of `~/.zcash` directory and/or take a VM snapshot?
 - Backing up / making a copy of the `~/.zcash` directory might help make the problem reproducible. Please redact appropriately.
 - Taking a VM snapshot is really helpful for interactively testing fixes