RFR: 8298618: Typo in JPEGImageReader and JPEGImageWriter

[Prasanta Sadhukhan]

Fixed Typo "form" should be "from"

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Commit messages:
 - Typo fix

Changes: https://git.openjdk.org/jdk/pull/11640/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11640&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8298618
  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/11640.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11640/head:pull/11640

PR: https://git.openjdk.org/jdk/pull/11640