Bump fluxcd/flux2 to latest release

Author: eks-distro-pr-bot

UPSTREAM_PROJECTS.yaml

@@ -105,7 +105,7 @@ projects:
     repos:
       - name: flux2
         versions:
-          - tag: v2.7.0
+          - tag: v2.7.5
             go_version: "1.25"
       - name: helm-controller
         versions: