Merge branch '34221-fix-missing-method-in-mmap2-gem' into 'master'

Update mmap2 gem to fix missing symbol error that happens on some installations from source

Closes #34221

See merge request !12492

Gemfile.lock

@@ -463,7 +463,7 @@ GEM
     mimemagic (0.3.0)
     mini_portile2 (2.1.0)
     minitest (5.7.0)
-    mmap2 (2.2.6)
+    mmap2 (2.2.7)
     mousetrap-rails (1.4.6)
     msgpack (1.1.0)
     multi_json (1.12.1)