Update prometheus-client-mmap to v0.11.0

This brings in the changes to override `MmapedDict#inspect` to avoid the
string explosion seen in
https://gitlab.com/gitlab-com/gl-infra/infrastructure/-/issues/10886.

Gemfile

@@ -328,7 +328,7 @@ group :metrics do
   gem 'method_source', '~> 0.8', require: false
 
   # Prometheus
-  gem 'prometheus-client-mmap', '~> 0.10.0'
+  gem 'prometheus-client-mmap', '~> 0.11.0'
   gem 'raindrops', '~> 0.18'
 end
 

Gemfile.lock

@@ -787,7 +787,7 @@ GEM
       parser
       unparser
     procto (0.0.3)
-    prometheus-client-mmap (0.10.0)
+    prometheus-client-mmap (0.11.0)
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
@@ -1345,7 +1345,7 @@ DEPENDENCIES
   pg (~> 1.1)
   png_quantizator (~> 0.2.1)
   premailer-rails (~> 1.10.3)
-  prometheus-client-mmap (~> 0.10.0)
+  prometheus-client-mmap (~> 0.11.0)
   pry-byebug (~> 3.5.1)
   pry-rails (~> 0.3.9)
   rack (~> 2.0.9)