Bump org.slf4j:slf4j-log4j12 from 2.0.18 to 2.0.20

Bumps org.slf4j:slf4j-log4j12 from 2.0.18 to 2.0.20.

---
updated-dependencies:
- dependency-name: org.slf4j:slf4j-log4j12
  dependency-version: 2.0.20
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

spring-cloud-function-adapters/spring-cloud-function-adapter-azure/pom.xml

@@ -64,7 +64,7 @@
 		<dependency>
 			<groupId>org.slf4j</groupId>
 			<artifactId>slf4j-log4j12</artifactId>
-			<version>2.0.18</version>
+			<version>2.0.20</version>
 			<scope>test</scope>
 		</dependency>