Adding backward slash to process.rst file

The process autorelease command for milestone-1 was missing a backward
slash in the command in (2) after the  --type library

Now, the command has the right forward slash that looks like this:
 --type library \

Change-Id: I852497033ff15d85fda50c61f4ec60bd2e4cc881
Signed-off-by: Armstrong Foundjem <foundjem@ieee.org>

doc/source/reference/process.rst

@@ -235,7 +235,7 @@ Milestone-1
                 --unreleased \
                 --model cycle-with-intermediary \
                 --type client-library \
-                --type library
+                --type library \
        > /tmp/deliverables.log
 
    - Edit the generated file (``/tmp/deliverables.log``) to remove tox's logs.