Update SpringBoot when approved version has Log4J 2.17.1 or higher

-Updated cps-dependencies/pom.xml SpringBoot to v2.6.4

Issue-ID: CPS-958
Change-Id: Idac149e77eab1c273694672ee0282868e0e8589a
Signed-off-by: JosephKeenan <joseph.keenan@est.tech>
diff --git a/pom.xml b/pom.xml
index b6e0f9a..363a6e7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -52,7 +52,7 @@
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-dependencies</artifactId>
-                <version>2.5.5</version>
+                <version>2.6.4</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
@@ -64,20 +64,17 @@
                 <scope>import</scope>
             </dependency>
             <dependency>
-                <groupId>org.apache.logging.log4j</groupId>
-                <artifactId>log4j-api</artifactId>
-                <version>2.17.1</version>
-            </dependency>
-            <dependency>
-                <groupId>org.apache.logging.log4j</groupId>
-                <artifactId>log4j-to-slf4j</artifactId>
-                <version>2.17.1</version>
-            </dependency>
-            <dependency>
                 <groupId>com.google.code.gson</groupId>
                 <artifactId>gson</artifactId>
                 <version>2.8.9</version>
             </dependency>
+            <dependency>
+                <groupId>org.springframework.cloud</groupId>
+                <artifactId>spring-cloud-dependencies</artifactId>
+                <version>2021.0.1</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
         </dependencies>
     </dependencyManagement>
     <dependencies>
@@ -251,7 +248,7 @@
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>
-                <version>2.3.3.RELEASE</version>
+                <version>2.6.4</version>
                 <executions>
                     <execution>
                         <goals>