fix links for branch change

also rename top of readme from `full-icu-npm` to `full-icu` to match the package name.

Ref: nodejs/i18n#502

CONTRIBUTING.md

@@ -1,9 +1,9 @@
-# Contributing to `full-icu-npm`
+# Contributing to `full-icu`
 
-## What is `full-icu-npm`?
+## What is `full-icu`?
 International Components for Unicode (ICU) is an open-source project of mature C/C++ and Java libraries for Unicode support, software internationalization, and software globalization. ICU is widely portable to many operating systems and environments, and is an initiative of the [Unicode Consortium](https://home.unicode.org/).
 
-Node.js uses ICU to implement these features in native C/C++ code. The full ICU data set is provided in Node.js by default, and this module is how it is provisioned to node. It's resulting npm package is published [here](https://www.npmjs.com/package/full-icu). 
+Node.js uses ICU to implement these features in native C/C++ code. The full ICU data set is provided in Node.js by default, and this module is how it is provisioned to node. It's resulting npm package is published [here](https://www.npmjs.com/package/full-icu).
 
 **We are thankful for Your interest in contributing to this effort!**
 
@@ -12,7 +12,7 @@ Node.js uses ICU to implement these features in native C/C++ code. The full ICU
 ## Code of Conduct
 Contributors to this repository must adhere to the [Node.js Code of Conduct](https://github.com/nodejs/admin/blob/HEAD/CODE_OF_CONDUCT.md).
 
-For more information on the Node.js Code of Conduct please review these [policy details](https://github.com/nodejs/node/blob/master/doc/guides/contributing/code-of-conduct.md).
+For more information on the Node.js Code of Conduct please review these [policy details](https://github.com/nodejs/node/blob/HEAD/doc/guides/contributing/code-of-conduct.md).
 
 ## Developer's Certificate of Origin 1.1
 

README.md

@@ -1,6 +1,6 @@
-# full-icu-npm
+# full-icu
 
-Install full ICU data from GitHub or npm
+Install full ICU data from GitHub or npm for Node.js.
 
 ### To use
 
@@ -59,7 +59,7 @@ Please see our [`CONTRIBUTING`](./CONTRIBUTING.md) guide if you'd like to help w
 
 ## LICENSE
 
-This repository is subject to the terms under the [Node.js license](https://github.com/nodejs/node/blob/master/LICENSE). Some usage of this data is governed by the [Unicode Terms of Use](http://www.unicode.org/copyright.html), which is included in the [unicode-license.txt](./unicode-license.txt)
+This repository is subject to the terms under the [Node.js license](https://github.com/nodejs/node/blob/main/LICENSE). Some usage of this data is governed by the [Unicode Terms of Use](http://www.unicode.org/copyright.html), which is included in the [unicode-license.txt](./unicode-license.txt)
 
 ## COPYRIGHT