Bump log4j-core from 2.15.0 to 2.17.0 in /mcspring-api/mcspring-base (#35)

Bumps log4j-core from 2.15.0 to 2.17.0.

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

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mcspring-api/mcspring-base/pom.xml

@@ -50,7 +50,7 @@
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-core</artifactId>
-            <version>2.15.0</version>
+            <version>2.17.0</version>
             <scope>provided</scope>
         </dependency>
         <dependency>