Bump gds-sso from 17.1.1 to 18.0.0

Bumps [gds-sso](https://github.com/alphagov/gds-sso) from 17.1.1 to 18.0.0.
- [Changelog](https://github.com/alphagov/gds-sso/blob/main/CHANGELOG.md)
- [Commits](alphagov/gds-sso@v17.1.1...v18.0.0)

---
updated-dependencies:
- dependency-name: gds-sso
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Gemfile.lock

@@ -122,7 +122,7 @@ GEM
       null_logger
       plek (>= 1.9.0)
       rest-client (~> 2.0)
-    gds-sso (17.1.1)
+    gds-sso (18.0.0)
       oauth2 (~> 2.0)
       omniauth (~> 2.1)
       omniauth-oauth2 (~> 1.8)
@@ -195,11 +195,11 @@ GEM
       mime-types-data (~> 3.2015)
     mime-types-data (3.2023.0218.1)
     mini_mime (1.1.2)
-    mini_portile2 (2.8.2)
+    mini_portile2 (2.8.4)
     minitest (5.19.0)
     msgpack (1.6.0)
     multi_xml (0.6.0)
-    net-imap (0.3.6)
+    net-imap (0.3.7)
       date
       net-protocol
     net-pop (0.1.2)
@@ -477,7 +477,7 @@ GEM
     raabro (1.4.0)
     racc (1.7.1)
     rack (2.2.8)
-    rack-protection (3.0.5)
+    rack-protection (3.0.6)
       rack
     rack-proxy (0.7.6)
       rack
@@ -634,7 +634,7 @@ GEM
       unf_ext
     unf_ext (0.0.8.2)
     unicode-display_width (2.4.2)
-    version_gem (1.1.1)
+    version_gem (1.1.3)
     warden (1.2.9)
       rack (>= 2.0.9)
     warden-oauth2 (0.0.1)
@@ -644,12 +644,12 @@ GEM
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)
     webrick (1.8.1)
-    websocket-driver (0.7.5)
+    websocket-driver (0.7.6)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
     with_advisory_lock (4.6.0)
       activerecord (>= 4.2)
-    zeitwerk (2.6.8)
+    zeitwerk (2.6.11)
 
 PLATFORMS
   aarch64-linux