Update dependency webmock to v3.20.0 (#29120)

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

Gemfile.lock

@@ -182,7 +182,8 @@ GEM
     cose (1.3.0)
       cbor (~> 0.5.9)
       openssl-signature_algorithm (~> 1.0)
-    crack (0.4.5)
+    crack (0.4.6)
+      bigdecimal
       rexml
     crass (1.0.6)
     css_parser (1.14.0)
@@ -314,7 +315,7 @@ GEM
       rainbow
       rubocop (>= 1.0)
       sysexits (~> 1.1)
-    hashdiff (1.0.1)
+    hashdiff (1.1.0)
     hashie (5.0.0)
     hcaptcha (7.1.0)
       json
@@ -792,7 +793,7 @@ GEM
     webfinger (1.2.0)
       activesupport
       httpclient (>= 2.4)
-    webmock (3.19.1)
+    webmock (3.20.0)
       addressable (>= 2.8.0)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)