add retry for pr link check

Signed-off-by: Bharath Nallapeta <nr.bharath97@gmail.com>

Author: bnallapeta

.github/workflows/pr-link-check.yaml

@@ -63,6 +63,8 @@ jobs:
           --fallback-extensions "md"
           --github-token "${GITHUB_TOKEN}"
           --insecure
+          --max-retries 3
+          --retry-wait-time 5
           --exclude-all-private
           --no-progress
           $(cat changed-files.txt | tr '\n' ' ')

.lycheeignore

@@ -3,5 +3,5 @@ https://docs.openstack.org/api-ref/network/v2/index.html
 https://docs.openstack.org/keystone/latest/user/application_credentials.html
 https://www.freedesktop.org/software/systemd/man/latest/sysupdate.d.html
 
-# v1beta2 API docs are published from this repo; links are valid once deployed
-https://cluster-api-openstack.sigs.k8s.io/api/v1beta2/api#.*
+# Our own site; links are valid once deployed, but flaky under automated checks
+https://cluster-api-openstack.sigs.k8s.io/.*