Replace two deprecated methods

[elharo]

No description provided.

[elharo]

Possible windows build is broken; need to investigate and might nee d to roll a recently merged PR back:

Error:  org.apache.maven.plugins.jlink.JLinkMojoTest.single_quotes_shell_command -- Time elapsed: 0.063 s <<< FAILURE!
org.opentest4j.AssertionFailedError: 

expected: "/bin/sh -c '/path/to/jlink "--strip-debug" "--module-path" "foo:bar" "--add-modules" "mvn,jlink"'"
 but was: "cmd.exe /X /C ""D:\path\to\jlink "--strip-debug" "--module-path" "foo;bar" "--add-modules" "mvn,jlink""""
	at org.apache.maven.plugins.jlink.JLinkMojoTest.single_quotes_shell_command(JLinkMojoTest.java:61)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)

[INFO] Running org.apache.maven.plugins.jlink.MultipleLauncherTest
[INFO] Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.016 s -- in org.apache.maven.plugins.jlink.MultipleLauncherTest
[INFO] 
[INFO] Results:
[INFO] 
Error:  Failures: 
Error:    JLinkMojoTest.single_quotes_shell_command:61 
expected: "/bin/sh -c '/path/to/jlink "--strip-debug" "--module-path" "foo:bar" "--add-modules" "mvn,jlink"'"
 but was: "cmd.exe /X /C ""D:\path\to\jlink "--strip-debug" "--module-path" "foo;bar" "--add-modules" "mvn,jlink""""
[INFO]