Merge pull request #2032 from freeCodeCamp/renovate/sinatra-3.x-lockfile

chore(deps): update dependency sinatra to v3.1.0

Author: renovate[bot]

Gemfile.lock

@@ -122,7 +122,7 @@ GEM
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
     thor (1.2.2)
-    tilt (2.0.11)
+    tilt (2.2.0)
     tty-pager (0.14.0)
       strings (~> 0.2.0)
       tty-screen (~> 0.8)