chore(images): pin service image updates

Replace floating service images with reviewable tags or digests.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

adguardhome/k8s/adguard.yaml

@@ -65,7 +65,7 @@ spec:
     spec:
       containers:
         - name: adguard
-          image: adguard/adguardhome:latest
+          image: adguard/adguardhome:v0.107.79
           resources:
             limits:
               memory: "1.5Gi"