chore(helm): update image chronograf digest to 7ab2cf1 (#31660)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| chronograf | digest | `f2e43fa` -> `7ab2cf1` |

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charts/stable/chronograf/Chart.yaml

@@ -33,4 +33,4 @@ sources:
   - https://hub.docker.com/_/chronograf
   - https://www.influxdata.com/time-series-platform/chronograf/
 type: application
-version: 7.5.1
+version: 7.5.2

charts/stable/chronograf/values.yaml

@@ -1,7 +1,7 @@
 image:
   pullPolicy: IfNotPresent
   repository: chronograf
-  tag: latest@sha256:f2e43fa52ab2968804dab17ffecd4bc855555d1feeb74464b5ccd3b9ff97a7c9
+  tag: latest@sha256:7ab2cf1a7f739860fe5bdd525d14f986edc134d0ba5793b8f65e044718fce0e7
 persistence:
   chronograf:
     enabled: true