Correct the published metadata

Adds library_name to the model card, and pipeline_tag where it was missing.
Brings the config and card licenses into agreement, and repairs the variant
declarations that did not match the files actually published here.

README.md

@@ -1,5 +1,7 @@
 ---
 license: apache-2.0
+pipeline_tag: image-to-text
+library_name: executorch
 ---
 
 # Introduction

xnnpack/config.json

@@ -9,6 +9,62 @@
   "backend": "xnnpack",
   "license": "apache-2.0",
   "variants": [
+    {
+      "file": "pp_ocrv6_xnnpack_fp32.pte",
+      "precision": "fp32",
+      "quantized": false,
+      "default": true,
+      "size_bytes": 31066200,
+      "methods": {
+        "detect": {
+          "inputs": [
+            {
+              "shape": [
+                1,
+                3,
+                -1,
+                -1
+              ],
+              "dtype": "float32"
+            }
+          ],
+          "outputs": [
+            {
+              "shape": [
+                1,
+                1,
+                -1,
+                -1
+              ],
+              "dtype": "float32"
+            }
+          ]
+        },
+        "recognize": {
+          "inputs": [
+            {
+              "shape": [
+                1,
+                3,
+                48,
+                -1
+              ],
+              "dtype": "float32"
+            }
+          ],
+          "outputs": [
+            {
+              "shape": [
+                1,
+                -1,
+                18710
+              ],
+              "dtype": "float32"
+            }
+          ]
+        }
+      }
+    },
     {
       "file": "pp_ocrv6_xnnpack_int8.pte",
       "precision": "int8",