Revert license format to string in Python-Pydantic-v1 samples (#21619)

Author: keepConcentration

samples/client/echo_api/python-pydantic-v1/pyproject.toml

@@ -3,7 +3,7 @@ name = "openapi_client"
 version = "1.0.0"
 description = "Echo Server API"
 authors = ["OpenAPI Generator Community <team@openapitools.org>"]
-license = { text = "Apache 2.0" }
+license = "Apache 2.0"
 readme = "README.md"
 repository = "https://github.com/GIT_USER_ID/GIT_REPO_ID"
 keywords = ["OpenAPI", "OpenAPI-Generator", "Echo Server API"]

samples/openapi3/client/petstore/python-pydantic-v1-aiohttp/pyproject.toml

@@ -3,7 +3,7 @@ name = "petstore_api"
 version = "1.0.0"
 description = "OpenAPI Petstore"
 authors = ["OpenAPI Generator Community <team@openapitools.org>"]
-license = { text = "Apache-2.0" }
+license = "Apache-2.0"
 readme = "README.md"
 repository = "https://github.com/GIT_USER_ID/GIT_REPO_ID"
 keywords = ["OpenAPI", "OpenAPI-Generator", "OpenAPI Petstore"]

samples/openapi3/client/petstore/python-pydantic-v1/pyproject.toml

@@ -3,7 +3,7 @@ name = "petstore_api"
 version = "1.0.0"
 description = "OpenAPI Petstore"
 authors = ["OpenAPI Generator Community <team@openapitools.org>"]
-license = { text = "Apache-2.0" }
+license = "Apache-2.0"
 readme = "README.md"
 repository = "https://GIT_HOST/GIT_USER_ID/GIT_REPO_ID"
 keywords = ["OpenAPI", "OpenAPI-Generator", "OpenAPI Petstore"]