chore(deps): update alerta/alerta-web docker tag to v9.1.0

[renovate]

This PR contains the following updates:

Package	Update	Change
alerta/alerta-web (source)	minor	9.0.4 → 9.1.0

---

Release Notes

alerta/alerta (alerta/alerta-web)

v9.1.0

Compare Source

Feat

• add counters for rejected, rate-limited, and blackout alerts (#​2049)
• auth: add CAS authentication provider (#​2045)
• Allow LDAP users with no email set to log in (#​2038)
• add SMTP_SKIP_SSL_VERIFY option (#​1955)
• add pagination support to environments endpoint (#​2029)

Fix

• remove default query limit cap on internal Postgres queries (#​2051)
• blackout matching fails when service/tags are NULL after update (#​2050)
• unack fails when ack entry evicted from history by HISTORY_LIMIT (#​2048)
• security: restrict self-update endpoint to allowlisted fields (#​2047)
• add missing StrEnum dependency, replace print with logging, fix schema injection (#​2046)
• mongodb querybuilder missing the valid_filter_params check (#​2039)
• security: parameterize Postgres query parser to prevent SQL injection (#​2040)
• deps: replace pkg_resources with importlib.metadata (#​2041)
• db: change keys.count field type from integer to bigint (#​1976)

---

Configuration

📅 Schedule: (UTC)

• Branch creation
  • At any time (no schedule defined)
• Automerge
  • At any time (no schedule defined)

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.