[jdk17u-dev] RFR: 8309095: Remove UTF-8 character from TaskbarPositionTest.java

[Martin Doerr]

Backport of [JDK-8309095](https://bugs.openjdk.org/browse/JDK-8309095).

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Commit messages:
 - Backport 07f2070411b3bff5608166ceae0e0bdbf155e7c2

Changes: https://git.openjdk.org/jdk17u-dev/pull/1651/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1651&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8309095
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1651.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1651/head:pull/1651

PR: https://git.openjdk.org/jdk17u-dev/pull/1651