RFR: 6878: Update Spotbugs latest version in jmc 8.0.0 source

[Suchita Chaturvedi]

Updating spotbugs version from 4.0.4 to 4.1.4 which is the latest available.

Please review the change.

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Commit messages:
 - 6878: Update Spotbugs latest version in jmc 8.0.0 source

Changes: https://git.openjdk.java.net/jmc/pull/145/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmc&pr=145&range=00
  Issue: https://bugs.openjdk.java.net/browse/JMC-6878
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jmc/pull/145.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/145/head:pull/145

PR: https://git.openjdk.java.net/jmc/pull/145