Update README.md, _index.md and RELEASE.md

Signed-off-by: Alexander Dahmen <alexander.dahmen@inovex.de>

Author: Fyusel

README.md

@@ -26,7 +26,7 @@ Apache 2.0
 ## Installing
 
 > [!NOTE]
-> Currently those packages are not available via the mentioned packages managers but can be installed locally by using the generated sdks directly.
+> Currently only the npm package is available via the mentioned packages managers but the other ones can be installed locally by using the generated sdks directly.
 > Keep in mind that this is in ALPHA state and only the Resource Manager and IaaS service is supported.
 > E.g. in order to create and install the TypeScript SDK you can use the following [guide](./examples/ts/README.md).
 

RELEASE.md

@@ -28,4 +28,4 @@ The version of the Pulumi provider is the same as the one for the Terraform prov
     - [GitHub releases page](https://github.com/stackitcloud/pulumi-stackit/releases)
     - [Pulumi registry](https://www.pulumi.com/registry/packages)
 7. Ensure the packages where properly published (e.g. to npm)
-    - [npm](https://www.npmjs.com/)
+    - [npm](https://www.npmjs.com/package/@stackitcloud/pulumi-stackit)

docs/_index.md

@@ -32,7 +32,7 @@ Apache 2.0
 ## Installing
 
 > [!NOTE]
-> Currently those packages are not available via the mentioned packages managers but can be installed locally by using the generated sdks directly.
+> Currently only the npm package is available via the mentioned packages managers but the other ones can be installed locally by using the generated sdks directly.
 > Keep in mind that this is in ALPHA state and only the Resource Manager and IaaS service is supported.
 > E.g. in order to create and install the TypeScript SDK you can use the following [guide](./examples/ts/README.md).