[jdk11u] RFR: 8314678: Bump update version for OpenJDK: jdk-11.0.20.1 [v2]

[Ben Taylor]

> Proposed branch for [JDK-8314678](https://bugs.openjdk.org/browse/JDK-8314678)
> 
> 
> Note that the merge preview on this branch will be incorrect as there is no upstream jdk11.0.20 branch, only a 11.0.20-ga tag. As such the PR is based on `master`.
> Changes against the GA tag can be viewed at [diff](https://github.com/openjdk/jdk11u/compare/jdk-11.0.20-ga...benty-amzn:jdk11u:jdk11.0.20.1?expand=1)
> 
> See also previous discussion on [jdk17u #374](https://github.com/openjdk/jdk17u/pull/374) and [jdk17u #375](https://github.com/openjdk/jdk17u/pull/375)

Ben Taylor has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:

  8314678: Bump update version for OpenJDK: jdk-11.0.20.1

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Changes:
  - all: https://git.openjdk.org/jdk11u/pull/76/files
  - new: https://git.openjdk.org/jdk11u/pull/76/files/f4a4f404..52892b3a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u&pr=76&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk11u&pr=76&range=00-01

  Stats: 1002 lines in 5 files changed: 1 ins; 987 del; 14 mod
  Patch: https://git.openjdk.org/jdk11u/pull/76.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u.git pull/76/head:pull/76

PR: https://git.openjdk.org/jdk11u/pull/76