keg: mkpath on main postgresql@X directories

Fix logic in Homebrew#16966 as it only matched subdirectories

Signed-off-by: Michael Cho <[email protected]>

Library/Homebrew/keg.rb

@@ -427,7 +427,7 @@ def link(verbose: false, dry_run: false, overwrite: false)
  link_dir("sbin", verbose:, dry_run:, overwrite:) { :skip_dir }
  link_dir("include", verbose:, dry_run:, overwrite:) do |relative_path|
  case relative_path.to_s
- when %r{^postgresql@\d+/}
+ when /^postgresql@\d+/
  :mkpath
  else
  :link
@@ -446,7 +446,7 @@ def link(verbose: false, dry_run: false, overwrite: false)
  /^fish/,
  %r{^lua/}, # Lua, Lua51, Lua53 all need the same handling.
  %r{^guile/},
- %r{^postgresql@\d+/},
+ /^postgresql@\d+/,
  *SHARE_PATHS
  :mkpath
  else
@@ -470,7 +470,7 @@ def link(verbose: false, dry_run: false, overwrite: false)
  /^ocaml/,
  /^perl5/,
  "php",
- %r{^postgresql@\d+/},
+ /^postgresql@\d+/,
  /^python[23]\.\d+/,
  /^R/,
  /^ruby/