Bump projectsigstore/rekor-server in /config/rekor/rekor (#1799)

Bumps projectsigstore/rekor-server from v1.4.2 to v1.4.3.

---
updated-dependencies:
- dependency-name: projectsigstore/rekor-server
  dependency-version: v1.4.3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

config/rekor/rekor/300-rekor.yaml

@@ -19,7 +19,7 @@ spec:
       serviceAccountName: rekor
       containers:
       - name: rekor
-        image: gcr.io/projectsigstore/rekor-server:v1.4.2@sha256:a8052cbed56cdfc6e134c5d405bce83458005cf9f8a9f627bc50b183785f1cbd
+        image: gcr.io/projectsigstore/rekor-server:v1.4.3@sha256:934250bb8ee753c991f99e4d516117f3e7bac8b7c3c45c06b143e455e73ae0ae
         ports:
         - containerPort: 3000
         args: [