Update versions.json and Dockerfiles for version 8.1.7

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Author: github-actions[bot]

8.1/alpine/Dockerfile

@@ -22,9 +22,9 @@
     }
   },
   "8.1": {
-    "version": "8.1.6",
-    "url": "https://github.com/valkey-io/valkey/archive/refs/tags/8.1.6.tar.gz",
-    "sha256": "8898dea8a51d25334db1835aeb55d475027f39d672213941308b9d3d470f832c",
+    "version": "8.1.7",
+    "url": "https://github.com/valkey-io/valkey/archive/refs/tags/8.1.7.tar.gz",
+    "sha256": "15c984f3fa7ee5b45a79cf9641e4871bf999acb65654940304e1c0807f58f7bc",
     "debian": {
       "version": "trixie"
     },