updating Form Recognizer V2.0 to stable (#10367)

* updating FR V2.0 to stable

* remove old tags

Author: kristapratico

specification/cognitiveservices/data-plane/FormRecognizer/readme.md

@@ -13,22 +13,25 @@ add-credentials: true
 openapi-type: data-plane
 ```
 
-``` yaml
-
-tag: release_1_0
-add-credentials: true
-openapi-type: data-plane
-```
 # Releases
 
 ### Release 2.0
 These settings apply only when `--tag=release_2_0` is specified on the command line.
 
 ``` yaml $(tag) == 'release_2_0'
+input-file: 
+  - stable/v2.0/FormRecognizer.json
+```
+
+### Release 2.0-preview
+These settings apply only when `--tag=release_2_0_preview` is specified on the command line.
+
+``` yaml $(tag) == 'release_2_0_preview'
 input-file: 
   - preview/v2.0/FormRecognizer.json
 ```
 
+
 ### Release 1.0
 These settings apply only when `--tag=release_1_0` is specified on the command line.
 
@@ -101,6 +104,7 @@ require: $(this-folder)/../../../../profiles/readme.md
 
 # all the input files across all versions
 input-file:
+  - $(this-folder)/stable/v2.0/FormRecognizer.json
   - $(this-folder)/preview/v2.0/FormRecognizer.json
   - $(this-folder)/preview/v1.0/FormRecognizer.json
   - $(this-folder)/preview/v1.0/FormRecognizerReceipt.json