Update dependency pg to v1.6.3 (#3014)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Gemfile.lock

@@ -327,7 +327,7 @@ GEM
     parser (3.3.10.0)
       ast (~> 2.4.1)
       racc
-    pg (1.6.2)
+    pg (1.6.3)
     pg_search (2.3.7)
       activerecord (>= 6.1)
       activesupport (>= 6.1)