Update docker.io/prom/blackbox-exporter Docker tag to v0.26.0

Automtated minor upgrade of Docker container by means of Portainer CE stack management with dependency update facilitated by Mend's Renovate Bot.

This MR contains the following updates:

Package Update Change
docker.io/prom/blackbox-exporter minor v0.25.0 -> v0.26.0

Release Notes

prometheus/blackbox_exporter (docker.io/prom/blackbox-exporter)

v0.26.0: 0.26.0 / 2025-02-26

Compare Source

  • [CHANGE] adopt log/slog, drop go-kit/log #​1311
  • [FEATURE] Add metric to record tls ciphersuite negotiated during handshake #​1203
  • [FEATURE] Add a way to export labels with content matched by the probe #​1284
  • [FEATURE] Reports Certificate Serial number #​1333
  • [ENHANCEMENT] Enable misspell linter #​1248
  • [ENHANCEMENT] Fix incorrect parameters name in documentation #​1126
  • [ENHANCEMENT] Add stale workflow to start sync with stale.yaml in prometheus #​1170
  • [ENHANCEMENT] Update CONFIGURATION.md to clarify that valid_status_codes expects a list #​1335
  • [ENHANCEMENT] Skip failing IPv6 tests in test CI Pipeline #​1342
  • [ENHANCEMENT] Add RabbitMQ probe example #​1349
  • [BUGFIX] Only register grpc TLS metrics on successful handshake #​1338