Sentry: bump getsentry/taskbroker from 26.3.1 to 26.4.1 in /services/sentry (#21)

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Author: dependabot[bot]

services/sentry/docker-compose.yml

@@ -817,7 +817,7 @@ services:
         max-file: "50"
 
   taskbroker:
-    image: "${TASKBROKER_IMAGE:-ghcr.io/getsentry/taskbroker:26.3.1}"
+    image: "${TASKBROKER_IMAGE:-ghcr.io/getsentry/taskbroker:26.4.1}"
     container_name: sentry-taskbroker
     depends_on:
       kafka: