Update ghcr.io/fluxcd/source-controller Docker tag to v1.8.3

Author: renovate-bot

manifests/cluster/flux-system/gotk-components.yaml

@@ -5397,7 +5397,7 @@ spec:
                 resourceFieldRef:
                   containerName: manager
                   resource: limits.memory
-          image: ghcr.io/fluxcd/source-controller:v1.6.2@sha256:11c8e14df885eff86586533d9941293ec8a1e9fff71bacf119edc79fdf3c63e3
+          image: ghcr.io/fluxcd/source-controller:v1.8.3@sha256:9864978c19249d572ff3beb19cf34bcb8fdaae450a96c2eb5a0ae2ffe09897c4
           imagePullPolicy: IfNotPresent
           livenessProbe:
             httpGet: