Address review: use /calico/latest/about (no trailing slash)

Match the file's established convention for the Calico About landing page
destination, avoiding inconsistent canonicalization. Per Copilot review.

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

Author: ctauchen

static/_redirects

@@ -135,15 +135,15 @@
 # DR 83
 /calico/latest/security/kubernetes-nodes /calico/latest/network-policy/hosts/kubernetes-nodes 301
 # DR 79
-/calico/latest/en/latest/understanding.html /calico/latest/about/ 301
+/calico/latest/en/latest/understanding.html /calico/latest/about 301
 # DR 73
 /calico/latest/security/ /calico/latest/network-policy/ 301
 # DR 72
 /calico/latest/master/reference/cni-plugin/configuration /calico/latest/reference/configure-cni-plugins 301
 /calico/latest/latest/getting-started/kubernetes/requirements /calico/latest/getting-started/kubernetes/requirements 301
 /calico/latest/latest/getting-started/kubernetes/installation/hosted/kubeadm/ /calico/latest/getting-started/kubernetes/self-managed-onprem/onpremises 301
 /calico/latest/latest/getting-started/kubernetes/installation/hosted/ /calico/latest/getting-started/ 301
-/calico/latest/master/introduction/ /calico/latest/about/ 301
+/calico/latest/master/introduction/ /calico/latest/about 301
 /calico/latest/getting-started/clis/calicoctl/configure/overview /calico/latest/operations/calicoctl/configure/overview 301
 /calico/latest/latest/getting-started/kubernetes/installation/ /calico/latest/getting-started/ 301
 /calico/latest/releases /calico/latest/release-notes/ 301
@@ -154,7 +154,7 @@
 /calico/latest/latest/getting-started/bare-metal/bare-metal /calico/latest/getting-started/bare-metal/ 301
 /calico/latest/security/service-policy /calico/latest/network-policy/policy-rules/service-policy 301
 /calico/latest/security/app-layer-policy /calico/latest/network-policy/istio/app-layer-policy 301
-/calico/latest/master /calico/latest/about/ 301
+/calico/latest/master /calico/latest/about 301
 /calico/latest/maintenance/troubleshoot/troubleshoot-ebpf /calico/latest/operations/ebpf/troubleshoot-ebpf 301
 /calico/latest/master/getting-started/bare-metal/bare-metal /calico/latest/getting-started/bare-metal/ 301
 # DR 30