fix daily perf Slack notification (#6267)

This PR fixes the Slack notification on daily perf runs. It also updates
the perf sha.

CHANGELOG_BEGIN
CHANGELOG_END

ci/cron/daily-compat.yml

@@ -100,4 +100,4 @@ jobs:
         displayName: measure perf
       - template: ../daily_tell_slack.yml
         parameters:
-          success-message: '$(cat $(Build.StagingDirectory)/perf-results.json | jq . | jq -sR ''{"text": "perf for ''"$COMMIT_LINK"'':```\(.)```"}'')'
+          success-message: '$(cat $(Build.StagingDirectory)/perf-results.json | jq . | jq -sR ''"perf for ''"$COMMIT_LINK"'':```\(.)```"'')'

ci/cron/perf/test_sha

@@ -1 +1 @@
-2a05bb877ec5333008e3c6546022800dd58f419f
+00972f38b56d70acd91f60d2e813900a38973254

ci/daily_tell_slack.yml

@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 parameters:
-  success-message: '"$(Agent.JobName) passed: $COMMIT_LINK"'
+  success-message: '\"$(Agent.JobName) passed: $COMMIT_LINK\"'
 
 steps:
 - bash: |
@@ -13,17 +13,20 @@ steps:
     if [ "$(Agent.JobStatus)" != "Succeeded" ]; then
         MESSAGE=":fire: :fire: <!here> :fire: :fire:\n$(Agent.JobName) *FAILED*: $COMMIT_LINK\n:fire: :fire:"
     else
-        MESSAGE=${{ parameters['success-message'] }}
+        MESSAGE="${{ parameters['success-message'] }}"
     fi
-    PAYLOAD="{\"text\":\"$MESSAGE\n\"}"
+    PAYLOAD="{\"text\":$MESSAGE}"
+    echo curl -XPOST \
+              -i \
+              -H 'Content-type: application/json' \
+              --data "$PAYLOAD" \
+              Slack.team-daml
     if [ "$(Build.SourceBranchName)" = "master" ]; then
         curl -XPOST \
              -i \
              -H 'Content-type: application/json' \
              --data "$PAYLOAD" \
              $(Slack.team-daml)
-    else
-        echo "$PAYLOAD"
     fi
   displayName: report
   condition: always()