This update for golang-github-prometheus-alertmanager fixes the following issues:
    
golang-github-prometheus-alertmanager was updated from version 0.23.0 to 0.26.0 (jsc#PED-7353):

- Version 0.26.0:
  * Security fixes:
    +  CVE-2023-40577: Fix stored XSS via the /api/v1/alerts endpoint in the Alertmanager UI (bsc#1218838)
  * Other changes and bugs fixed:
    + Configuration: Fix empty list of receivers and inhibit_rules would cause the alertmanager to crash
    + Templating: Fixed a race condition when using the title function. It is now race-safe
    + API: Fixed duplicate receiver names in the api/v2/receivers API endpoint
    + API: Attempting to delete a silence now returns the correct status code, 404 instead of 500
    + Clustering: Fixes a panic when tls_client_config is empty
    + Webhook: url is now marked as a secret. It will no longer show up in the logs as clear-text
    + Metrics: New label reason for alertmanager_notifications_failed_total metric to indicate the type of error of the
      alert delivery
    + Clustering: New flag --cluster.label, to help to block any traffic that is not meant for the cluster
    + Integrations: Add Microsoft Teams as a supported integration
- Version 0.25.0:
  * Fail configuration loading if api_key and api_key_file are defined at the same time
  * Fix the alertmanager_alerts metric to avoid counting resolved alerts as active. Also added a new
    alertmanager_marked_alerts metric that retain the old behavior
  * Trim contents of Slack API URLs when reading from files
  * amtool: Avoid panic when the label value matcher is empty
  * Fail configuration loading if api_url is empty for OpsGenie
  * Fix email template for resolved notifications
  * Add proxy_url support for OAuth2 in HTTP client configuration
  * Reload TLS certificate and key from disk when updated
  * Add Discord integration
  * Add Webex integration
  * Add min_version support to select the minimum TLS version in HTTP client configuration
  * Add max_version support to select the maximum TLS version in HTTP client configuration
  * Emit warning logs when truncating messages in notifications
  * Support HEAD method for the /-/healty and /-/ready endpoints
  * Add support for reading global and local SMTP passwords from files
  * UI: Add 'Link' button to alerts in list
  * UI: Allow to choose the first day of the week as Sunday or Monday
- Version 0.24.0:
  * Fix HTTP client configuration for the SNS receiver
  * Fix unclosed file descriptor after reading the silences snapshot file
  * Fix field names for mute_time_intervals in JSON marshaling
  * Ensure that the root route doesn't have any matchers
  * Truncate the message's title to 1024 chars to avoid hitting Slack limits
  * Fix the default HTML email template (email.default.html) to match with the canonical source
  * Detect SNS FIFO topic based on the rendered value
  * Avoid deleting and recreating a silence when an update is possible
  * api/v2: Return 200 OK when deleting an expired silence
  * amtool: Fix the silence's end date when adding a silence. The end date is (start date + duration) while it used to
    be (current time + duration). The new behavior is consistent with the update operation
  * Add the /api/v2 prefix to all endpoints in the OpenAPI specification and generated client code
  * Add --cluster.tls-config experimental flag to secure cluster traffic via mutual TLS
  * Add Telegram integration