Fix parameter indentation on Swift rebalance playbook

Unfortunately I messed up the indentation during a rebase.

Related-Bug: 1759311
Change-Id: I31db903787feded6acecd67dc98ef10b6bf26ea8
(cherry picked from commit 1787014691)

playbooks/swift_ring_rebalance.yaml

@@ -53,7 +53,7 @@
             src: /tmp/swift-rings.tar.gz
             dest: /{{ base_directory }}
             remote_src: yes
-            become: true
+          become: true
 
     - name: Get recon data
       command: cat /var/cache/swift/object.recon
@@ -118,4 +118,4 @@
             src: /tmp/swift-rings.tar.gz
             dest: /{{ base_directory }}
             remote_src: yes
-            become: true
+          become: true