Bump gds_zendesk from 3.3.0 to 3.6.0

Bumps [gds_zendesk](https://github.com/alphagov/gds_zendesk) from 3.3.0 to 3.6.0.
- [Changelog](https://github.com/alphagov/gds_zendesk/blob/main/CHANGELOG.md)
- [Commits](alphagov/gds_zendesk@v3.3.0...v3.6.0)

---
updated-dependencies:
- dependency-name: gds_zendesk
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -184,9 +184,9 @@ GEM
     fugit (1.8.1)
       et-orbi (~> 1, >= 1.2.7)
       raabro (~> 1.4)
-    gds_zendesk (3.3.0)
+    gds_zendesk (3.6.0)
       null_logger (~> 0)
-      zendesk_api (~> 1.27)
+      zendesk_api (>= 1.37, < 4.0)
     globalid (1.2.1)
       activesupport (>= 6.1)
     govuk-components (5.0.2)
@@ -249,7 +249,7 @@ GEM
     minitest (5.22.2)
     msgpack (1.6.0)
     multi_xml (0.6.0)
-    multipart-post (2.2.3)
+    multipart-post (2.4.0)
     mutex_m (0.2.0)
     net-http (0.4.1)
       uri
@@ -530,7 +530,7 @@ GEM
       nokogiri (~> 1.8)
     yard (0.9.34)
     zeitwerk (2.6.13)
-    zendesk_api (1.38.0.rc1)
+    zendesk_api (3.0.5)
       faraday (> 2.0.0)
       faraday-multipart
       hashie (>= 3.5.2, < 6.0.0)