chore: feedback round 2.

Author: pvorozhe

go/plumbing/operations/operations_client.go

@@ -225,16 +225,16 @@ paths:
           $ref: '#/responses/error'
       description: >-
         Returns all environment variables for an account or site. An
-        account corresponds to a team in the Netlify UI. To use this endpoint,
-        opt in to the beta environment variable experience using the Netlify UI.
+        account corresponds to a team in the Netlify UI. To use this endpoint, your 
+        site must no longer be using the classic environment experience. Migrate now with the Netlify UI.
     post:
       tags:
         - environmentVariables
       operationId: createEnvVars
       description: >-
         Creates new environment variables. Granular scopes are available
-        on Pro plans and above.  To use this endpoint, opt in to the beta environment
-        variable experience using the Netlify UI.
+        on Pro plans and above.  To use this endpoint, your site must no longer be 
+        using the classic environment experience. Migrate now with the Netlify UI.
       parameters:
         - in: body
           name: env_vars
@@ -315,16 +315,16 @@ paths:
         default:
           $ref: '#/responses/error'
       description: >-
-        Returns an individual environment variable. To use this endpoint,
-        opt in to the beta environment variable experience using the Netlify UI.
+        Returns an individual environment variable. To use this endpoint, your site
+        must no longer be using the classic environment experience. Migrate now with the Netlify UI.
     put:
       tags:
         - environmentVariables
       operationId: updateEnvVar
       description: >-
         Updates an existing environment variable and all of its values.
-        Existing values will be replaced by values provided. To use this endpoint,
-        opt in to the beta environment variable experience using the Netlify UI.
+        Existing values will be replaced by values provided. To use this endpoint, your site must
+        no longer be using the classic environment experience. Migrate now with the Netlify UI.
       parameters:
         - name: account_id
           description: Scope response to account_id
@@ -378,7 +378,8 @@ paths:
         - environmentVariables
       operationId: setEnvVarValue
       description: >-
-        Updates or creates a new value for an existing environment variable. To use this endpoint, opt in to the beta environment variable experience using the Netlify UI.
+        Updates or creates a new value for an existing environment variable. To use this endpoint, your site
+        must no longer be using the classic environment experience. Migrate now with the Netlify UI.
       parameters:
         - name: account_id
           description: Scope response to account_id
@@ -444,8 +445,8 @@ paths:
         default:
           $ref: '#/responses/error'
       description: >-
-        Deletes an environment variable. To use this endpoint,
-        opt in to the beta environment variable experience using the Netlify UI.
+        Deletes an environment variable. To use this endpoint, your site must no
+        longer be using the classic environment experience. Migrate now with the Netlify UI.
   /accounts/{account_id}/env/{key}/value/{id}:
     delete:
       tags:
@@ -480,8 +481,8 @@ paths:
         default:
           $ref: '#/responses/error'
       description: >-
-        Deletes a specific environment variable value. To use this endpoint, 
-        opt in to the beta environment variable experience using the Netlify UI.
+        Deletes a specific environment variable value. To use this endpoint, your site
+        must no longer be using the classic environment experience. Migrate now with the Netlify UI.
   /sites/{site_id}/forms:
     get:
       operationId: listSiteForms