ruby: Add Podfile as Ruby extension language path suffix (#12392)

Release Notes:

- N/A

Closes zed-industries/extensions#803

extensions/ruby/languages/ruby/config.toml

@@ -20,6 +20,7 @@ path_suffixes = [
     "thor",
     "pryrc",
     "simplecov",
+    "Podfile",
 ]
 first_line_pattern = '^#!.*\bruby\b'
 line_comments = ["# "]