Bump stackprof from 0.2.11 to 0.2.12 (#8803)

Bumps [stackprof](https://github.com/tmm1/stackprof) from 0.2.11 to 0.2.12.
- [Release notes](https://github.com/tmm1/stackprof/releases)
- [Changelog](https://github.com/tmm1/stackprof/blob/master/CHANGELOG.md)
- [Commits](https://github.com/tmm1/stackprof/commits)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Gemfile.lock

@@ -580,7 +580,7 @@ GEM
     sshkit (1.16.0)
       net-scp (>= 1.1.2)
       net-ssh (>= 2.8.0)
-    stackprof (0.2.11)
+    stackprof (0.2.12)
     statsd-ruby (1.2.1)
     stoplight (2.1.3)
     streamio-ffmpeg (3.0.2)