Update metadata

Signed-off-by: Norwin Schnyder <[email protected]>

Author: snorwin

geps/gep-1897/metadata.yaml

@@ -15,3 +15,6 @@ relationships:
     - number: 1282
       name: Describing Backend Properties
       description: Implements just part of the Backend Properties GEP.
+extendedBy:
+  - number: 4152
+    name: Extending TLS Validation in BackendTLSPolicy

geps/gep-4152/index.md

@@ -1,4 +1,4 @@
-# GEP-4152: Allow flexible TLS Validation in BackendTLSPolicy
+# GEP-4152: Extending TLS Validation in BackendTLSPolicy
 
 * Issue: [#4152](https://github.com/kubernetes-sigs/gateway-api/issues/4152)
 * Status: Provisional
@@ -21,9 +21,7 @@ runtime.
 In such scenarios, users may need the flexibility to disable certificate
 verification or to use certificate pinning. Certificate pinning offers a safer
 and more controlled alternative, instead of bypassing TLS validation, the gateway
-verifies that the backend’s certificate matches a known fingerprint or public key
-hash. This preserves the confidentiality and integrity guarantees of TLS while
-removing the operational overhead of managing full certificate chains or trusted
+verifies that the backend’s certificate matches a known fingerprint or public key  extendedBy:head of managing full certificate chains or trusted
 CA bundles.
 
 ### User Stories

geps/gep-4152/metadata.yaml

@@ -1,7 +1,10 @@
 apiVersion: internal.gateway.networking.k8s.io/v1alpha1
 kind: GEPDetails
 number: 4152
-name: Allow flexible TLS Validation in BackendTLSPolicy
+name: Extending TLS Validation in BackendTLSPolicy
 status: Provisional
 authors:
   - snorwin
+extends:
+  - number: 1897
+    name: BackendTLSPolicy - Explicit Backend TLS Connection Configuration