Fix source file's license header

[findinpath]

Description

Update the licensing header of the file to use Apache License

[findepi]

Thanks!
do you know why was this not caught by maven checks? cc @nineinchnick

[findinpath]

Relevant PR where the class with the inappropriate licensing header was introduced #11197

[findinpath]

          <groupId>com.mycila</groupId>
          <artifactId>license-maven-plugin</artifactId>
          <version>3.0</version>
          <executions>
            <execution>
              <phase>validate</phase>
              <goals>
                <goal>check</goal>
              </goals>
              <configuration>
                <skip>false</skip>
                <skipExistingHeaders>true</skipExistingHeaders>

From the project's effective pom.xml

So, I'm assuming that if the license header already exists (which it did in this case) the validator will not complain

[martint]

We had a similar issue before: #10812