fix(deps): update module github.com/fluxcd/source-controller/api to v1.8.4 (#634)

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

go.mod

@@ -16,7 +16,7 @@ require (
 	github.com/cert-manager/cert-manager v1.20.2
 	github.com/creasty/defaults v1.8.0
 	github.com/fluxcd/helm-controller/api v1.5.4
-	github.com/fluxcd/source-controller/api v1.8.3
+	github.com/fluxcd/source-controller/api v1.8.4
 	github.com/go-logr/logr v1.4.3
 	github.com/kcp-dev/kcp/sdk v0.28.3
 	github.com/mandelsoft/goutils v0.0.0-20260507153918-c39bb4bb4b7b

go.sum

@@ -37,8 +37,8 @@ github.com/fluxcd/pkg/apis/kustomize v1.15.1 h1:t9QZh+3ZS8EKmlxrnnbcKZcGTrg8FDvM
 github.com/fluxcd/pkg/apis/kustomize v1.15.1/go.mod h1:IZOy4CCtR/hxMGb7erK1RfbGnczVv4/dRBoVD37AywI=
 github.com/fluxcd/pkg/apis/meta v1.25.1 h1:WG1GIC/SOz0GjxT0uVuO6AMicQ3yFsk6bDozCnq+fto=
 github.com/fluxcd/pkg/apis/meta v1.25.1/go.mod h1:c7o6mJGLCMvNrfdinGZehkrdZuFT9vZdZNrn66DtVD0=
-github.com/fluxcd/source-controller/api v1.8.3 h1:WNEETjmp/YTZx5IMg9ewz2Wn8YzOVETeJJ0LIPivm40=
-github.com/fluxcd/source-controller/api v1.8.3/go.mod h1:sio4t49RDx+S1etHRFAEEw8qfVuw0KKlOg8bRVlEYPM=
+github.com/fluxcd/source-controller/api v1.8.4 h1:ZJIh7OFhjxZgsD81ahxxbu3ggA7qySIjKWbK5+PKmOI=
+github.com/fluxcd/source-controller/api v1.8.4/go.mod h1:sio4t49RDx+S1etHRFAEEw8qfVuw0KKlOg8bRVlEYPM=
 github.com/fsnotify/fsnotify v1.9.0 h1:2Ml+OJNzbYCTzsxtv8vKSFD9PbJjmhYF14k/jKC7S9k=
 github.com/fsnotify/fsnotify v1.9.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=
 github.com/fxamacker/cbor/v2 v2.9.0 h1:NpKPmjDBgUfBms6tr6JZkTHtfFGcMKsw3eGcmD/sapM=