Correct 3.23.1 coreos/fluentd versions to match shipped release

The prometheus stack and fluentd CVE bumps shipped in 3.23.1 but the
generated releases.json still carried the pre-bump versions:
prometheus v3.11.3->v3.12.0, prometheus-operator/config-reloader
v0.90.1->v0.91.0, alertmanager v0.32.0->v0.33.0, fluentd 1.19.2->1.19.3.
Manual edit; matches release/internal/pinnedversion/enterprise.go at the
3.23.1 release commit.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: rene-dekker

calico-enterprise_versioned_docs/version-3.23-2/releases.json

@@ -48,22 +48,22 @@
         "image": "tigera/compliance-snapshotter"
       },
       "coreos-alertmanager": {
-        "version": "v0.32.0"
+        "version": "v0.33.0"
       },
       "coreos-config-reloader": {
-        "version": "v0.90.1"
+        "version": "v0.91.0"
       },
       "coreos-dex": {
         "version": "v2.45.1"
       },
       "coreos-fluentd": {
-        "version": "1.19.2"
+        "version": "1.19.3"
       },
       "coreos-prometheus": {
-        "version": "v3.11.3"
+        "version": "v3.12.0"
       },
       "coreos-prometheus-operator": {
-        "version": "v0.90.1"
+        "version": "v0.91.0"
       },
       "csi": {
         "version": "v3.23.1",