Maintenance: Update dependency telephone_number to v1.4.20

Gemfile.lock

@@ -544,7 +544,7 @@ GEM
       faraday (~> 2.0)
       faraday-multipart (~> 1.0)
       zeitwerk (~> 2.6)
-    telephone_number (1.4.19)
+    telephone_number (1.4.20)
     terser (1.1.14)
       execjs (>= 0.3.0, < 3)
     test-unit (3.5.7)