chore(deps): update memcached docker tag to v1.6.38 (main) (#16853)

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

Author: renovate[bot]

docs/sources/setup/install/helm/reference.md

@@ -6836,7 +6836,7 @@ false
 			<td>string</td>
 			<td>Memcached Docker image tag</td>
 			<td><pre lang="json">
-"1.6.37-alpine"
+"1.6.38-alpine"
 </pre>
 </td>
 		</tr>

production/helm/loki/values.yaml

@@ -3175,7 +3175,7 @@ memcached:
     # -- Memcached Docker image repository
     repository: memcached
     # -- Memcached Docker image tag
-    tag: 1.6.37-alpine
+    tag: 1.6.38-alpine
     # -- Memcached Docker image pull policy
     pullPolicy: IfNotPresent
   # -- The SecurityContext override for memcached pods

tools/dev/loki-tsdb-storage-s3/docker-compose.yml

@@ -29,7 +29,7 @@ services:
   memcached:
     logging:
       <<: *logging
-    image: memcached:1.6.37-alpine
+    image: memcached:1.6.38-alpine
 
   jaeger:
     logging: