dependabot security fix for Release 1.5.0 (#262)

Author: yashmeet29

pom.xml

@@ -35,7 +35,7 @@
         <generation-folder>src/gen</generation-folder>
 
         <test-spring-boot-version>3.2.5</test-spring-boot-version>
-        <sdk-bom-version>5.15.0</sdk-bom-version>
+        <sdk-bom-version>5.21.0</sdk-bom-version>
         <mockito-bom-version>5.15.2</mockito-bom-version>
         <assertj-core-version>3.27.3</assertj-core-version>
         <mockito-core-version>5.15.2</mockito-core-version>

sdm/pom.xml

@@ -308,12 +308,19 @@
                 <groupId>com.sap.cloud.sdk.cloudplatform</groupId>
                 <artifactId>connectivity-oauth</artifactId>
             </exclusion>
+            <exclusion>
+                <groupId>com.sap.cloud.sdk.cloudplatform</groupId>
+                <artifactId>cloudplatform-core</artifactId>
+            </exclusion>
           </exclusions>
         </dependency>
+        <dependency>
+            <groupId>com.sap.cloud.sdk.cloudplatform</groupId>
+            <artifactId>cloudplatform-core</artifactId>
+        </dependency>
         <dependency>
             <groupId>com.sap.cloud.sdk.cloudplatform</groupId>
             <artifactId>connectivity-oauth</artifactId>
-            <version>5.17.0</version>
             <exclusions>
                 <exclusion>
                     <groupId>com.sap.cloud.sdk.cloudplatform</groupId>