Update docker.io/prom/alertmanager Docker tag to v0.33.0

v0.33.0: 0.33.0 / 2026-06-12

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• [CHANGE] The '--enable-feature=auto-gomaxprocs' option has been removed. This flag had no effect since v0.29 and was deprecated in v0.32. It can be safely removed from any startup scripts. #​5090, #​5251
• [CHANGE] Add group-key-in-metrics feature flag. #​5047
• [CHANGE] Move AlertMarker, GroupMarker to marker package. #​5047
• [CHANGE] Remove alertmanager_marked_alerts. #​5047
• [CHANGE] Remove the following from types package: MemMarker, AlertState*, AlertStatus. #​5047
• [FEATURE] Introduce per aggregation group AlertMarkers and drop Global Alert Marker. #​5047
• [FEATURE] ui: Add support for silence annotations. #​5017
• [FEATURE] api: Add receiver labels and receiver_matchers filter to /api/v2/receivers, /api/v2/alerts, and /api/v2/alerts/groups. #​5152
• [FEATURE] eventrecorder: Add structured event recorder behind --enable-feature=event-recorder, with file, webhook, and kafka outputs. #​5072, #​5246
• [ENHANCEMENT] Add the use_aws_http_client config option to the sns notifier. #​5178
• [ENHANCEMENT] template: Add now function to get current time. #​5188
• [ENHANCEMENT] docs: Clarify YAML quoting vs matcher token quoting in UTF-8 matchers section. #​5264
• [BUGFIX] jira: Allow disabling the resolve transition when resolve_transition is not set. #​4821
• [BUGFIX] jira: Include unresolved issues in wont_fix_resolution JQL to prevent duplicate issue creation. #​5185
• [BUGFIX] sns: Support the AWS_CA_BUNDLE env variable for the sns notifier. #​5178

v0.32.2: 0.32.2 / 2026-06-05

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• [BUGFIX] Fix dispatcher goroutine leaks on destroyed alertgroup swap. #​5241

v0.32.1: 0.32.1 / 2026-04-29

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• [BUGFIX] dispatcher: Fix issue with dispatching to a contended route. #​5179
• [BUGFIX] ui: Provide prebuilt ui assets in release. #​5191
• [ENHANCEMENT] ui: Support building artifacts in containers with Docker or Podman. #​5102