Bump haml from 5.0.4 to 5.1.1

Bumps [haml](https://github.com/haml/haml) from 5.0.4 to 5.1.1.
- [Release notes](https://github.com/haml/haml/releases)
- [Changelog](https://github.com/haml/haml/blob/master/CHANGELOG.md)
- [Commits](haml/haml@v5.0.4...v5.1.1)

Author: dependabot-preview[bot]

Gemfile.lock

@@ -155,7 +155,7 @@ GEM
     github-markdown (0.6.9)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
-    haml (5.0.4)
+    haml (5.1.1)
       temple (>= 0.8.0)
       tilt
     hashie (3.6.0)
@@ -355,12 +355,12 @@ GEM
     stripe (4.16.0)
       faraday (~> 0.13)
       net-http-persistent (~> 3.0)
-    temple (0.8.0)
+    temple (0.8.1)
     term-ansicolor (1.7.1)
       tins (~> 1.0)
     thor (0.19.4)
     thread_safe (0.3.6)
-    tilt (2.0.8)
+    tilt (2.0.9)
     timecop (0.9.1)
     tins (1.20.2)
     turbolinks (5.2.0)