Updated tag value for the Timezone Service to conform to standards. (#36005)

* Updated tag value for the Timezone Service to conform to standards.

* changed tag

* changed tag

Author: stevemunk

specification/maps/data-plane/Timezone/readme.md

@@ -27,7 +27,7 @@ These are the global settings for Timezone Client.
 ``` yaml
 title: TimezoneClient
 openapi-type: data-plane
-tag: 1.0-preview
+tag: package-stable-1.0
 # at some point those credentials will move away to Swagger according to [this](https://github.com/Azure/autorest/issues/3718)
 add-credentials: true
 credential-default-policy-type: BearerTokenCredentialPolicy
@@ -45,11 +45,11 @@ directive:
 ```
 
 
-### Tag: 1.0-preview
+### Tag: package-stable-1.0
 
-These settings apply only when `--tag=1.0-preview` is specified on the command line.
+These settings apply only when `--tag=package-stable-1.0` is specified on the command line.
 
-``` yaml $(tag) == '1.0-preview'
+``` yaml $(tag) == 'package-stable-1.0'
 input-file:
   - preview/1.0/timezone.json
 ```