Rename .yml to .yaml, the official extension

Author: vy

.github/dependabot.yml renamed to .github/dependabot.yaml

@@ -15,10 +15,10 @@
     limitations under the License.
 ////
 
-https://github.com/apache/logging-log4j2/actions/workflows/build.yml[image:https://img.shields.io/github/actions/workflow/status/apache/logging-log4j2/build.yml?branch=2.x&label=build%20%282.x%29[Build (2.x)]]
+https://github.com/apache/logging-log4j2/actions/workflows/build.yaml[image:https://img.shields.io/github/actions/workflow/status/apache/logging-log4j2/build.yml?branch=2.x&label=build%20%282.x%29[Build (2.x)]]
 https://search.maven.org/artifact/org.apache.logging.log4j/log4j-api[image:https://img.shields.io/maven-central/v/org.apache.logging.log4j/log4j-api?versionPrefix=2.[Maven Central (2.x)]]
 https://libraries.io/maven/org.apache.logging.log4j:log4j-core/2.20.0[image:https://img.shields.io/librariesio/release/maven/org.apache.logging.log4j%3Alog4j-core/2.20.0?label=dependencies%20(2.x)[Libraries.io dependency status for 2.x]]
-https://github.com/apache/logging-log4j2/security/code-scanning[image:https://github.com/apache/logging-log4j2/actions/workflows/codeql-analysis.yml/badge.svg?branch=2.x[CodeQL (2.x)]]
+https://github.com/apache/logging-log4j2/security/code-scanning[image:https://github.com/apache/logging-log4j2/actions/workflows/codeql-analysis.yaml/badge.svg?branch=2.x[CodeQL (2.x)]]
 
 Apache Log4j is a versatile, industrial-grade Java logging framework composed of an API, its implementation,  and components to assist the deployment for various use cases.
 For further information (support, download, etc.) see https://logging.apache.org/log4j[the project website].

.github/workflows/build.yml renamed to .github/workflows/build.yaml

@@ -73,7 +73,7 @@ public Session connect() {
     protected void before() throws Throwable {
         final Path root = Files.createTempDirectory("cassandra");
         Files.createDirectories(root.resolve("data"));
-        final Path config = root.resolve("cassandra.yml");
+        final Path config = root.resolve("cassandra.yaml");
         Files.copy(getClass().getResourceAsStream("/cassandra.yaml"), config);
         System.setProperty("cassandra.native_transport_port", "0");
         System.setProperty("cassandra.storage_port", "0");

.github/workflows/codeql-analysis.yml renamed to .github/workflows/codeql-analysis.yaml

@@ -32,7 +32,7 @@
 import org.junit.jupiter.api.Test;
 
 @Tag("yaml")
-@LoggerContextSource("log4j2-2134.yml")
+@LoggerContextSource("log4j2-2134.yaml")
 public class JiraLog4j2_2134Test {
 
     @Test

.github/workflows/scorecards-analysis.yml renamed to .github/workflows/scorecards-analysis.yaml

@@ -27,7 +27,7 @@
 import org.apache.logging.log4j.core.test.junit.Named;
 import org.junit.jupiter.api.Test;
 
-@LoggerContextSource("SequenceNumberPatternConverterTest.yml")
+@LoggerContextSource("SequenceNumberPatternConverterTest.yaml")
 public class SequenceNumberPatternConverterTest {
 
     @Test

README.adoc

@@ -27,7 +27,7 @@
 import org.apache.logging.log4j.core.test.junit.Named;
 import org.junit.jupiter.api.Test;
 
-@LoggerContextSource("SequenceNumberPatternConverterZeroPaddedTest.yml")
+@LoggerContextSource("SequenceNumberPatternConverterZeroPaddedTest.yaml")
 public class SequenceNumberPatternConverterZeroPaddedTest {
 
     @Test