Bump no.nav.k9.sak:kontrakt from 4.1.12 to 4.1.15 (#1181)

Bumps [no.nav.k9.sak:kontrakt](https://github.com/navikt/k9-sak) from 4.1.12 to 4.1.15.
- [Commits](https://github.com/navikt/k9-sak/commits)

---
updated-dependencies:
- dependency-name: no.nav.k9.sak:kontrakt
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pom.xml

@@ -31,7 +31,7 @@
         <logback-syslog4j.version>1.0.0</logback-syslog4j.version>
 
         <!-- Kontrakt -->
-        <k9-sak.version>4.1.12</k9-sak.version>
+        <k9-sak.version>4.1.15</k9-sak.version>
         <k9-formidling.version>1.0.13</k9-formidling.version>
         <k9-format.version>9.3.0</k9-format.version>
         <k9-rapid.version>1.20240510083323-9f05ca1</k9-rapid.version>