Bump golang.org/x/image from 0.14.0 to 0.15.0 (#2778)

Bumps [golang.org/x/image](https://github.com/golang/image) from 0.14.0 to 0.15.0.
- [Commits](https://github.com/golang/image/compare/v0.14.0...v0.15.0)

---
updated-dependencies:
- dependency-name: golang.org/x/image
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -45,7 +45,7 @@ require (
 	github.com/unrolled/secure v1.13.0
 	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673
 	golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e
-	golang.org/x/image v0.14.0
+	golang.org/x/image v0.15.0
 	golang.org/x/sync v0.5.0
 	golang.org/x/text v0.14.0
 	gopkg.in/yaml.v3 v3.0.1