docs: update some github urls in docs.

* init-package-json is now https://github.com/npm/init-package-json
* node-semver is now https://github.com/npm/node-semver

PR-URL: #1982
Credit: @takenspc
Close: #1982
Reviewed-by: @ruyadorno

Author: takenspc

docs/content/cli-commands/npm-init.md

@@ -68,7 +68,7 @@ will create a scoped package.
 
 ### See Also
 
-* <https://github.com/isaacs/init-package-json>
+* <https://github.com/npm/init-package-json>
 * [package.json](/configuring-npm/package-json)
 * [npm version](/cli-commands/version)
 * [npm scope](/using-npm/scope)

docs/content/configuring-npm/package-json.md

@@ -58,7 +58,7 @@ Changes to the package should come along with changes to the version. If you don
 plan to publish your package, the name and version fields are optional.
 
 Version must be parseable by
-[node-semver](https://github.com/isaacs/node-semver), which is bundled
+[node-semver](https://github.com/npm/node-semver), which is bundled
 with npm as a dependency.  (`npm install semver` to use it yourself.)
 
 More on version numbers and ranges at [semver](/using-npm/semver).