[librsvg] CI: Fix indentation I broke on last commit

[Jordan Petridis <jpetridis src gnome org>]

commit 891e975a2d11d698b7154a42248eb566a610fafe
Author: Jordan Petridis <jordanpetridis protonmail com>
Date:   Fri Aug 3 04:58:09 2018 +0000

    CI: Fix indentation I broke on last commit

 .gitlab-ci.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d6f685c5..df80d017 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -202,14 +202,14 @@ rustc 1.26 1:
   <<: *rustc
   <<: *stage_3
 
-  rustc 1.27 2:
+rustc 1.27 2:
   image: $RUSTC_1_27
   variables:
     LIBRSVG_DEBUG: "yes"
   <<: *rustc
   <<: *stage_3
 
-  rustc 1.28 3:
+rustc 1.28 3:
   image: $RUSTC_1_28
   variables:
     LIBRSVG_DEBUG: "yes"