RFR: 8356119: Typo in bytecode behavior for Lookup.findGetter

[Steffen Nießing]

This PR fixes a typo in the bytecode cast for Lookup.findGetter.

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Commit messages:
 - 8356119: Correct field type for bytecode cast

Changes: https://git.openjdk.org/jdk/pull/25024/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25024&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8356119
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/25024.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25024/head:pull/25024

PR: https://git.openjdk.org/jdk/pull/25024