Update ghcr.io/navikt/mock-oauth2-server Docker tag to v3

Signed-off-by: red-hat-konflux <126015336+red-hat-konflux[bot]@users.noreply.github.com>

Author: red-hat-konflux[bot]

.gitlab-ci.yml

@@ -76,7 +76,7 @@ bdd-tests:
       - ./logs
     expire_in: 1 week
   services:
-    - name: ghcr.io/navikt/mock-oauth2-server:2.3.0
+    - name: ghcr.io/navikt/mock-oauth2-server:3.0.1
       alias: mock-oauth2-server
       variables:
         PORT: 8081