Switch renovate schedule from weekly to monthly #399

Namespace: <a href="https://konflux-ui.apps.stone-prd-rh01.pg1f.p1.openshiftapps.com/ns/exd-sp-rhel-wf-tenant" rel="nofollow">exd-sp-rhel-wf-tenant
PipelineRun: <a href="https://konflux-ui.apps.stone-prd-rh01.pg1f.p1.openshiftapps.com/ns/exd-sp-rhel-wf-tenant/pipelinerun/retasc-on-pull-request-l2h42" rel="nofollow">retasc-on-pull-request-l2h42

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Status	Duration	Name
🟢 Succeeded	5 seconds	init
🟢 Succeeded	13 seconds	clone-repository
🟢 Succeeded	12 seconds	prefetch-dependencies
🟢 Succeeded	2 minutes	build-container
🟢 Succeeded	12 seconds	build-image-index
🟢 Succeeded	19 seconds	clair-scan
🟢 Succeeded	27 seconds	clamav-scan
🟢 Succeeded	13 seconds	deprecated-base-image-check
🟢 Succeeded	19 seconds	ecosystem-cert-preflight-checks
🟢 Succeeded	7 seconds	push-dockerfile
🟢 Succeeded	16 seconds	rpms-signature-scan
🟢 Succeeded	9 seconds	sast-shell-check
🟢 Succeeded	8 seconds	sast-snyk-check
🟢 Succeeded	8 seconds	sast-unicode-check
🟢 Succeeded	6 seconds	apply-tags
🟢 Succeeded	10 seconds	show-sbom