RFR: 8315116: fix minor issue in copyright header introduced by JDK-8269957 that is breaking the build

[Daniel D. Daugherty]

On Mon, 28 Aug 2023 15:28:54 GMT, Vicente Romero <vromero at openjdk.org> wrote:

> The copyright header of new file: `src/jdk.compiler/share/classes/com/sun/tools/javac/util/Utf8NameTable.java` introduced by the fix for `JDK-8269957` is missing a `,` after the copyright year.

Thumbs up. This is a trivial fix.

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Marked as reviewed by dcubed (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/15450#pullrequestreview-1598558533