test: update pinned alpine image to 3.18

Signed-off-by: CrazyMax <[email protected]>

Author: crazy-max

util/testutil/integration/pins.go

@@ -7,9 +7,10 @@ var pins = map[string]map[string]string{
 		"arm64v8": "sha256:ffe38d75e44d8ffac4cd6d09777ffc31e94ea0ded6a0164e825a325dc17a3b68",
 		"library": "sha256:f4ed5f2163110c26d42741fdc92bd1710e118aed4edb19212548e8ca4e5fca22",
 	},
+	// alpine 3.18
 	"alpine:latest": {
-		"amd64":   "sha256:c0d488a800e4127c334ad20d61d7bc21b4097540327217dfab52262adc02380c",
-		"arm64v8": "sha256:af06af3514c44a964d3b905b498cf6493db8f1cde7c10e078213a89c87308ba0",
-		"library": "sha256:8914eb54f968791faf6a8638949e480fef81e697984fba772b3976835194c6d4",
+		"amd64":   "sha256:25fad2a32ad1f6f510e528448ae1ec69a28ef81916a004d3629874104f8a7f70",
+		"arm64v8": "sha256:e3bd82196e98898cae9fe7fbfd6e2436530485974dc4fb3b7ddb69134eda2407",
+		"library": "sha256:82d1e9d7ed48a7523bdebc18cf6290bdb97b82302a8a9c27d4fe885949ea94d1",
 	},
 }