RFR: 8374567: Reference to "bugs.openjdk.org" sometimes redirects to login page

[Kevin Rushforth]

This PR changes the links to the JBS home page -- https://bugs.openjdk.org/ -- to point to the JBS project page instead: https://bugs.openjdk.org/projects/JDK

This avoids a potential problem where the JBS home page redirects to the login page for those without a JBS login.

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Commit messages:
 - JDK-8374567: Reference to "bugs.openjdk.org" sometimes redirects to login page

Changes: https://git.openjdk.org/jfx/pull/2027/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=2027&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8374567
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jfx/pull/2027.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/2027/head:pull/2027

PR: https://git.openjdk.org/jfx/pull/2027