Fix manual URL for alto777_LFSR

manifests/alto777_LFSR.json

@@ -4,9 +4,9 @@
   "authorEmail": "ram32768@gmail.com",
   "license": "BSD-3-Clause",
   "sourceUrl": "https://github.com/alto777/LFSR",
-  "manualUrl": "https://github.com/alto777/LFSR/README.md",
+  "manualUrl": "https://github.com/alto777/LFSR/blob/master/README.md",
   "repoVersion": "0.6.02",
   "latestVersion": "0.6.02",
   "buildTimestamp": 1523522975,
   "status": "available"
-}
+}