Merge pull request #56 from ddbj/dependabot/bundler/backend/pg-1.4.6

Bump pg from 1.4.5 to 1.4.6 in /backend

Author: ursm

backend/Gemfile.lock

@@ -197,7 +197,7 @@ GEM
     nokogiri (1.14.2-x86_64-linux)
       racc (~> 1.4)
     os (1.1.4)
-    pg (1.4.5)
+    pg (1.4.6)
     public_suffix (5.0.1)
     puma (6.1.0)
       nio4r (~> 2.0)