Fix a typo

Thanks to Eric Pailleau for reporting it!

doc/src/guide/releases.asciidoc

@@ -136,7 +136,7 @@ Add/Update the `overlay` section of your `relx.config`:
     {template, "rel/version", "version"}
 ]}.
 
-When you run `mare rel` it creates the file '$(RELX_OUTPUT_DIR)/example/version'
+When you run `make rel` it creates the file '$(RELX_OUTPUT_DIR)/example/version'
 which contains the version value generated by Relx.
 
 [source,bash]