Bump log4j-core in /generators/generators/app/templates/empty/project (#1413)

Bumps log4j-core from 2.15.0 to 2.17.1.

---
updated-dependencies:
- dependency-name: org.apache.logging.log4j:log4j-core
  dependency-type: direct:production
...

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generators/generators/app/templates/empty/project/pom.xml

@@ -60,7 +60,7 @@
       <dependency>
         <groupId>org.apache.logging.log4j</groupId>
         <artifactId>log4j-core</artifactId>
-        <version>2.15.0</version>
+        <version>2.17.1</version>
       </dependency>
       <dependency>
         <groupId>org.apache.logging.log4j</groupId>