RFR: 8305808: Typo in javadoc of ConstantDescs::BSM_VARHANDLE_STATIC_FIELD

[Mandy Chung]

`s/ConstantBootstraps.staticVarHandle/ConstantBootstraps.staticFieldVarHandle`

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Commit messages:
 - 8305808: Typo in javadoc of ConstantDescs::BSM_VARHANDLE_STATIC_FIELD

Changes: https://git.openjdk.org/jdk/pull/13411/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13411&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8305808
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/13411.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13411/head:pull/13411

PR: https://git.openjdk.org/jdk/pull/13411