[r][license]: Fixing license and contact information (#4317)

* fix(license): Fixing the license information

* fix(license): Fixing the license information

Author: saigiridhar21

modules/openapi-generator/src/main/resources/r/description.mustache

@@ -1,11 +1,11 @@
 Package: {{{packageName}}}
 Title: R Package Client for {{{appName}}}
 Version: {{packageVersion}}
-Authors@R: person("OpenAPI Generator community", email = "team@openapitools.org", role = c("aut", "cre"))
+Authors@R: person("{{#infoName}}{{infoName}}{{/infoName}}{{^infoName}}OpenAPI Generator community{{/infoName}}", email = "{{#infoEmail}}{{infoEmail}}{{/infoEmail}}{{^infoEmail}}team@openapitools.org{{/infoEmail}}", role = c("aut", "cre"))
 Description: {{{appDescription}}}{{^appDescription}}R Package Client for {{{appName}}}{{/appDescription}}
 Depends: R (>= 3.3.3)
 Encoding: UTF-8
-License: Unlicense
+License: {{#licenseInfo}}{{licenseInfo}}{{/licenseInfo}}{{^licenseInfo}}Unlicense{{/licenseInfo}}
 LazyData: true
 Suggests: testthat
 Imports: jsonlite, httr, R6, caTools{{#useRlangExceptionHandling}}, rlang{{/useRlangExceptionHandling}}

samples/client/petstore/R/DESCRIPTION

@@ -5,7 +5,7 @@ Authors@R: person("OpenAPI Generator community", email = "team@openapitools.org"
 Description: This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
 Depends: R (>= 3.3.3)
 Encoding: UTF-8
-License: Unlicense
+License: Apache-2.0
 LazyData: true
 Suggests: testthat
 Imports: jsonlite, httr, R6, caTools