Update spring-boot-maven-plugin to 2.4.4

Change-Id: I8ba1e544b2e80ad66aacd230c4a442bdc1d60375

pom.xml

diff --git a/pom.xml b/pom.xml
index 1d19501..d086d14 100644
--- a/pom.xml
+++ b/pom.xml
@@ -397,7 +397,7 @@
         <plugin>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-maven-plugin</artifactId>
-          <version>2.4.1</version>
+          <version>2.4.4</version>
         </plugin>
         <plugin>
           <groupId>org.eclipse.dash</groupId>