Update quay.io/keycloak/keycloak Docker tag to v26.4.4 (main) (#8510)

Update quay.io/keycloak/keycloak Docker tag to v26.4.4

| datasource | package                   | from   | to     |
| ---------- | ------------------------- | ------ | ------ |
| docker     | quay.io/keycloak/keycloak | 26.4.2 | 26.4.4 |

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

examples/custom-resources/jwks/keycloak.yaml

@@ -31,7 +31,7 @@ spec:
     spec:
       containers:
       - name: keycloak
-        image: quay.io/keycloak/keycloak:26.4.2
+        image: quay.io/keycloak/keycloak:26.4.4
         args: ["start-dev"]
         env:
         - name: KC_BOOTSTRAP_ADMIN_USERNAME

examples/custom-resources/oidc/keycloak.yaml

@@ -31,7 +31,7 @@ spec:
     spec:
       containers:
       - name: keycloak
-        image: quay.io/keycloak/keycloak:26.4.2
+        image: quay.io/keycloak/keycloak:26.4.4
         args: ["start-dev"]
         env:
         - name: KC_BOOTSTRAP_ADMIN_USERNAME