Fix typo in ingestion spec sample (#11433)

* Update index.md

Fix typo in the ingestion spec sample

* fixed more typos
diff --git a/docs/ingestion/index.md b/docs/ingestion/index.md
index adcfe09..edc07ed 100644
--- a/docs/ingestion/index.md
+++ b/docs/ingestion/index.md
@@ -309,8 +309,8 @@
       },
       "dimensionsSpec": {
         "dimensions": [
-          { "type": "string", "page" },
-          { "type": "string", "language" },
+          "page",
+          "language",
           { "type": "long", "name": "userId" }
         ]
       },
@@ -382,8 +382,8 @@
   },
   "dimensionsSpec": {
     "dimensions": [
-      { "type": "string", "page" },
-      { "type": "string", "language" },
+      "page",
+      "language",
       { "type": "long", "name": "userId" }
     ]
   },
@@ -660,8 +660,8 @@
     },
     "dimensionsSpec": {
       "dimensions": [
-        { "type": "string", "page" },
-        { "type": "string", "language" },
+        "page",
+        "language",
         { "type": "long", "name": "userId" }
       ]
     }