chore(deps): update curlimages/curl docker tag to v7.88.1 (#459)

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

Author: renovate[bot]

test/e2e/kuttl/flagd-disabled/00-install.yaml

@@ -102,7 +102,7 @@ spec:
     spec:
       containers:
         - name: test-flagd-endpoint
-          image: curlimages/curl:7.72.0
+          image: curlimages/curl:7.88.1
           args:
             - /bin/sh
             - -ec

test/e2e/kuttl/inject-flagd/00-install.yaml

@@ -103,7 +103,7 @@ spec:
     spec:
       containers:
         - name: test-flagd-endpoint
-          image: curlimages/curl:7.72.0
+          image: curlimages/curl:7.88.1
           args:
             - /bin/sh
             - -ec