Update `golang.org/x/image` to v0.18.0 (#31541)

Result of `go get -u  golang.org/x/image && make tidy`

Fixes: https://github.com/go-gitea/gitea/security/dependabot/67

go.mod

@@ -109,7 +109,7 @@ require (
 	github.com/yuin/goldmark-highlighting/v2 v2.0.0-20230729083705-37449abec8cc
 	github.com/yuin/goldmark-meta v1.1.0
 	golang.org/x/crypto v0.24.0
-	golang.org/x/image v0.15.0
+	golang.org/x/image v0.18.0
 	golang.org/x/net v0.26.0
 	golang.org/x/oauth2 v0.21.0
 	golang.org/x/sys v0.21.0

go.sum

@@ -868,8 +868,8 @@ golang.org/x/crypto v0.24.0 h1:mnl8DM0o513X8fdIkmyFE/5hTYxbwYOjDS/+rK6qpRI=
 golang.org/x/crypto v0.24.0/go.mod h1:Z1PMYSOR5nyMcyAVAIQSKCDwalqy85Aqn1x3Ws4L5DM=
 golang.org/x/exp v0.0.0-20240314144324-c7f7c6466f7f h1:3CW0unweImhOzd5FmYuRsD4Y4oQFKZIjAnKbjV4WIrw=
 golang.org/x/exp v0.0.0-20240314144324-c7f7c6466f7f/go.mod h1:CxmFvTBINI24O/j8iY7H1xHzx2i4OsyguNBmN/uPtqc=
-golang.org/x/image v0.15.0 h1:kOELfmgrmJlw4Cdb7g/QGuB3CvDrXbqEIww/pNtNBm8=
-golang.org/x/image v0.15.0/go.mod h1:HUYqC05R2ZcZ3ejNQsIHQDQiwWM4JBqmm6MKANTp4LE=
+golang.org/x/image v0.18.0 h1:jGzIakQa/ZXI1I0Fxvaa9W7yP25TqT6cHIHn+6CqvSQ=
+golang.org/x/image v0.18.0/go.mod h1:4yyo5vMFQjVjUcVk4jEQcU9MGy/rulF5WvUILseCM2E=
 golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=