chore: resolve open dependabot security alerts

- erb 6.0.2 -> 6.0.4 (high, alert #13)

Signed-off-by: Jonathan Norris <jonathan.norris@dynatrace.com>

Author: jonathannorris

Gemfile.lock

@@ -43,7 +43,7 @@ GEM
       reline (>= 0.3.8)
     diff-lcs (1.6.2)
     docile (1.4.1)
-    erb (6.0.2)
+    erb (6.0.4)
     ffi (1.17.4)
     fileutils (1.8.0)
     io-console (0.8.2)