Adding cpell.json to override Rdma spelling.

sdk/computefleet/Azure.ResourceManager.ComputeFleet/cspell.json

@@ -0,0 +1,17 @@
+// cSpell Settings
+{
+    // Version of the setting file.  Always 0.2
+    "version": "0.2",
+    // language - current active spelling language
+    "language": "en",
+    // words - list of words to be always considered correct
+    "words": [
+		"Rdma"
+	],
+    // flagWords - list of words to be always considered incorrect
+    // This is useful for offensive words and common spelling errors.
+    // For example "hte" should be "the"
+    "flagWords": [
+        "hte"
+    ]
+}