Bump prow jobs to use ghcr.io/kcp-dev/infra/build:1.20.13-1

Signed-off-by: Marvin Beckers <marvin@kubermatic.com>

Author: embik

.prow.yaml

@@ -7,7 +7,7 @@ presubmits:
       preset-goproxy: "true"
     spec:
       containers:
-        - image: ghcr.io/kcp-dev/infra/build:1.19.9-1
+        - image: ghcr.io/kcp-dev/infra/build:1.20.13-1
           command:
             - make
             - verify-imports
@@ -21,7 +21,7 @@ presubmits:
       preset-goproxy: "true"
     spec:
       containers:
-        - image: ghcr.io/kcp-dev/infra/build:1.19.9-1
+        - image: ghcr.io/kcp-dev/infra/build:1.20.13-1
           command:
             - make
             - lint
@@ -34,7 +34,7 @@ presubmits:
       preset-goproxy: "true"
     spec:
       containers:
-        - image: ghcr.io/kcp-dev/infra/build:1.19.9-1
+        - image: ghcr.io/kcp-dev/infra/build:1.20.13-1
           command:
             - make
             - test