fix: hooks/ruby/delete-repository-event/Gemfile.lock to reduce vulner…

…abilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-RUBY-RACK-1061917

hooks/ruby/delete-repository-event/Gemfile.lock

@@ -21,21 +21,24 @@ GEM
     faraday-net_http_persistent (1.2.0)
     faraday-patron (1.0.0)
     multipart-post (2.1.1)
+    mustermann (3.0.0)
+      ruby2_keywords (~> 0.0.1)
     octokit (4.6.2)
       sawyer (~> 0.8.0, >= 0.5.3)
     public_suffix (4.0.6)
-    rack (1.6.13)
-    rack-protection (1.5.5)
+    rack (2.2.4)
+    rack-protection (3.0.2)
       rack
     ruby2_keywords (0.0.4)
     sawyer (0.8.2)
       addressable (>= 2.3.5)
       faraday (> 0.8, < 2.0)
-    sinatra (1.4.8)
-      rack (~> 1.5)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
-    tilt (2.0.6)
+    sinatra (3.0.2)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.2)
+      tilt (~> 2.0)
+    tilt (2.0.11)
 
 PLATFORMS
   ruby
@@ -45,4 +48,4 @@ DEPENDENCIES
   sinatra
 
 BUNDLED WITH
-   1.14.6
+   1.17.3