Update dependency bootsnap to v1.21.0

Author: renovate[bot]

Gemfile.lock

@@ -81,7 +81,7 @@ GEM
     bigdecimal (3.3.1)
     binding_of_caller (1.0.1)
       debug_inspector (>= 1.2.0)
-    bootsnap (1.20.1)
+    bootsnap (1.21.0)
       msgpack (~> 1.2)
     builder (3.3.0)
     byebug (12.0.0)