fix(deps): update dependency com.google.cloud:spring-cloud-gcp-dependencies to v6

Author: renovate[bot]

pom.xml

@@ -54,7 +54,7 @@
     <dependency-check-maven.version>12.1.0</dependency-check-maven.version>
     <gatling-maven-plugin.version>4.16.1</gatling-maven-plugin.version>
     <gatling.version>3.13.4</gatling.version>
-    <gcp.sdk.version>5.6.1</gcp.sdk.version>
+    <gcp.sdk.version>6.0.1</gcp.sdk.version>
     <github.button.version>2.14.1</github.button.version>
     <java.version>23</java.version>
     <jquery.version>3.7.1</jquery.version>