build(deps): bump spring-framework-bom from 5.3.16 to 5.3.20 (#166)

Bumps [spring-framework-bom](https://github.com/spring-projects/spring-framework) from 5.3.16 to 5.3.20.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.3.16...v5.3.20)

---
updated-dependencies:
- dependency-name: org.springframework:spring-framework-bom
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pom.xml

@@ -23,7 +23,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>11</java.version>
-		<spring-framework.version>5.3.16</spring-framework.version>
+		<spring-framework.version>5.3.20</spring-framework.version>
         <commons-lang3.version>3.12.0</commons-lang3.version>
         <lombok.version>1.18.24</lombok.version>
         <javax.servlet-api.version>3.1.0</javax.servlet-api.version>