fix(conformance): regenerate L1 render goldens for oauth2-proxy v7.15.6

PR #136 bumps the renderer's OAUTH2_PROXY_IMAGE; the container-workload
and egress-class (vpn + internet) goldens still pinned v7.8.1. Regenerated
with the check scripts' own invocation; each diff is the image tag only.
Also updates the crafty README's current-pin row.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

conformance/tests/l1-rendering/container-workload-render/golden/expected.yaml

@@ -62,7 +62,7 @@ spec:
         ports:
         - containerPort: 8080
       - name: oauth2-proxy
-        image: quay.io/oauth2-proxy/oauth2-proxy:v7.8.1
+        image: quay.io/oauth2-proxy/oauth2-proxy:v7.15.6
         imagePullPolicy: IfNotPresent
         args:
         - --http-address=0.0.0.0:4180

conformance/tests/l1-rendering/egress-class-render/golden/egress-internet.expected.yaml

@@ -85,7 +85,7 @@ spec:
         - name: config
           mountPath: /data/config
       - name: oauth2-proxy
-        image: quay.io/oauth2-proxy/oauth2-proxy:v7.8.1
+        image: quay.io/oauth2-proxy/oauth2-proxy:v7.15.6
         imagePullPolicy: IfNotPresent
         args:
         - --http-address=0.0.0.0:4180

conformance/tests/l1-rendering/egress-class-render/golden/egress-vpn.expected.yaml

@@ -85,7 +85,7 @@ spec:
         - name: config
           mountPath: /data/config
       - name: oauth2-proxy
-        image: quay.io/oauth2-proxy/oauth2-proxy:v7.8.1
+        image: quay.io/oauth2-proxy/oauth2-proxy:v7.15.6
         imagePullPolicy: IfNotPresent
         args:
         - --http-address=0.0.0.0:4180