ci(micrometer): bump typed-descriptor opt-in to PR 7487 head (#2187)

## Summary
- Points the `typed-descriptor` compat matrix leg at the latest head of
[micrometer-metrics/micrometer#7487](micrometer-metrics/micrometer#7487)
(`84092837e`), which now builds against client_java 1.7.0 and uses the
typed `MetricFamilyDescriptor` API.
- Updates renovate `currentValue` to match the actual PR branch
(`feat/prom-client-java-typed-family-descriptor`).

## Test plan
- [ ] Micrometer Compatibility workflow `typed-descriptor` leg passes

---------

Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

Author: zeitlinger

.github/workflows/micrometer-compatibility.yml

@@ -24,8 +24,8 @@ jobs:
             # Prometheus client integration to typed descriptors by default.
             # Follow-up: https://github.com/prometheus/client_java/issues/2182
             repository: zeitlinger/micrometer
-            # renovate: datasource=git-refs depName=zeitlinger/micrometer packageName=https://github.com/zeitlinger/micrometer currentValue=feat/prometheus-client-opt-in
-            ref: 1af1b3185058941eea57dc467bfe0df5a4786fe4
+            # renovate: datasource=git-refs depName=zeitlinger/micrometer packageName=https://github.com/zeitlinger/micrometer currentValue=feat/prom-client-java-typed-family-descriptor
+            ref: 09f32142f06b11a88afe41eab50daaf6c8d08efb
     steps:
       - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with: