Bump com.fasterxml.jackson.core:jackson-core in /tools/upgradetool (#5393)

Bumps [com.fasterxml.jackson.core:jackson-core](https://github.com/FasterXML/jackson-core) from 2.21.0 to 2.21.1.
- [Commits](https://github.com/FasterXML/jackson-core/compare/jackson-core-2.21.0...jackson-core-2.21.1)

---
updated-dependencies:
- dependency-name: com.fasterxml.jackson.core:jackson-core
  dependency-version: 2.21.1
  dependency-type: direct:production
...

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tools/upgradetool/pom.xml

@@ -19,7 +19,7 @@
 
   <properties>
     <jackson.annotations.version>2.21</jackson.annotations.version>
-    <jackson.version>2.21.0</jackson.version>
+    <jackson.version>2.21.1</jackson.version>
   </properties>
 
   <dependencies>