deps(deps): update module sigs.k8s.io/cluster-api to v1.8.4

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

Author: renovate[bot]

go.mod

@@ -17,7 +17,7 @@ require (
 	k8s.io/api v0.31.1
 	k8s.io/apimachinery v0.31.1
 	k8s.io/client-go v0.31.1
-	sigs.k8s.io/cluster-api v1.8.2
+	sigs.k8s.io/cluster-api v1.8.4
 	sigs.k8s.io/controller-runtime v0.19.0
 )
 

go.sum

@@ -419,8 +419,8 @@ launchpad.net/gocheck v0.0.0-20140225173054-000000000087/go.mod h1:hj7XX3B/0A+80
 launchpad.net/xmlpath v0.0.0-20130614043138-000000000004/go.mod h1:vqyExLOM3qBx7mvYRkoxjSCF945s0mbe7YynlKYXtsA=
 sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.30.3 h1:2770sDpzrjjsAtVhSeUFseziht227YAWYHLGNM8QPwY=
 sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.30.3/go.mod h1:Ve9uj1L+deCXFrPOk1LpFXqTg7LCFzFso6PA48q/XZw=
-sigs.k8s.io/cluster-api v1.8.2 h1:upWtsmCIAZK82WvEX6T/jlXW7XC6YwCEQFo2FezXH0c=
-sigs.k8s.io/cluster-api v1.8.2/go.mod h1:pXv5LqLxuIbhGIXykyNKiJh+KrLweSBajVHHitPLyoY=
+sigs.k8s.io/cluster-api v1.8.4 h1:jBKQH1H/HUdUFk8T6qDzIxZJfWw1F5ZP0ZpYQJDmTHs=
+sigs.k8s.io/cluster-api v1.8.4/go.mod h1:pXv5LqLxuIbhGIXykyNKiJh+KrLweSBajVHHitPLyoY=
 sigs.k8s.io/controller-runtime v0.19.0 h1:nWVM7aq+Il2ABxwiCizrVDSlmDcshi9llbaFbC0ji/Q=
 sigs.k8s.io/controller-runtime v0.19.0/go.mod h1:iRmWllt8IlaLjvTTDLhRBXIEtkCK6hwVBJJsYS9Ajf4=
 sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd h1:EDPBXCAspyGV4jQlpZSudPeMmr1bNJefnuqLsRAsHZo=