Bump io.micrometer:micrometer-core in /pgp-keys-map-test1

Bumps [io.micrometer:micrometer-core](https://github.com/micrometer-metrics/micrometer) from 1.15.3 to 1.15.4.
- [Release notes](https://github.com/micrometer-metrics/micrometer/releases)
- [Commits](micrometer-metrics/micrometer@v1.15.3...v1.15.4)

---
updated-dependencies:
- dependency-name: io.micrometer:micrometer-core
  dependency-version: 1.15.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pgp-keys-map-test1/pom.xml

@@ -307,7 +307,7 @@
         <dependency>
             <groupId>io.micrometer</groupId>
             <artifactId>micrometer-core</artifactId>
-            <version>[1.15.3]</version>
+            <version>[1.15.4]</version>
         </dependency>
         <dependency>
             <groupId>io.micrometer</groupId>