Bump seanmiddleditch/gha-setup-ninja from 4 to 6

Bumps [seanmiddleditch/gha-setup-ninja](https://github.com/seanmiddleditch/gha-setup-ninja) from 4 to 6.
- [Release notes](https://github.com/seanmiddleditch/gha-setup-ninja/releases)
- [Commits](seanmiddleditch/gha-setup-ninja@8b29707...3b1f8f9)

---
updated-dependencies:
- dependency-name: seanmiddleditch/gha-setup-ninja
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/dummy.yml

@@ -195,8 +195,8 @@ jobs:
       - uses: scala-steward-org/scala-steward-action@a47d19c37d74bf079ad9528ee04d511c1f3d1805
       - uses: scalacenter/sbt-dependency-submission@64084844d2b0a9b6c3765f33acde2fbe3f5ae7d3
       - uses: scottbrenner/puppet-lint-action@2491d895fe3d0beac4a453bf90c3e087e47d8d5e
-      - uses: seanmiddleditch/gha-setup-ninja@8b297075da4cd2a5f1fd21fe011b499edf06e9d2
-      - uses: seanmiddleditch/gha-setup-ninja@v4
+      - uses: seanmiddleditch/gha-setup-ninja@3b1f8f94a2f8254bd26914c4ab9474d4f0015f67
+      - uses: seanmiddleditch/gha-setup-ninja@v6
       - uses: securego/gosec@53aee87f9fa5e513efcaaa99e387f9b5e9fbab47
       - uses: shivammathur/setup-php@4cdabe8a53c84876e0d2e0cb9b0a0f370c4171e7
       - uses: shogo82148/actions-setup-perl@1358ec99f8d1069243050e42a75a3cdce3e91607