fix(deps): update module github.com/gin-gonic/gin to v1.9.1 [security]

Author: plural-renovate[bot]

go.mod

@@ -9,7 +9,7 @@ require (
 	github.com/Yamashou/gqlgenc v0.14.0
 	github.com/evanphx/json-patch v5.6.0+incompatible
 	github.com/fluxcd/flagger v1.35.0
-	github.com/gin-gonic/gin v1.7.7
+	github.com/gin-gonic/gin v1.9.1
 	github.com/gofrs/flock v0.8.1
 	github.com/mitchellh/mapstructure v1.5.0
 	github.com/onsi/ginkgo/v2 v2.12.1