RFR: 7493: Update versions and copyright on Update site pages

[Suchita Chaturvedi]

This PR updates the copyright year and Eclipse pre-requisite version.

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Commit messages:
 - 7493: Update versions and copyright on Update site pages
 - 7493: Update versions and copyright on Update site pages

Changes: https://git.openjdk.java.net/jmc/pull/346/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmc&pr=346&range=00
  Issue: https://bugs.openjdk.java.net/browse/JMC-7493
  Stats: 9 lines in 4 files changed: 1 ins; 0 del; 8 mod
  Patch: https://git.openjdk.java.net/jmc/pull/346.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/346/head:pull/346

PR: https://git.openjdk.java.net/jmc/pull/346