Update readme to latest buildpack release

Author: gee4vee

README.md

@@ -182,7 +182,7 @@ The buildpack will detect your app as Swift if it has a `Package.swift` file in
 
 ### Version installed on the IBM Cloud
 
-The latest version of the IBM Cloud buildpack for Swift on the IBM Cloud is [v2.1.1](https://github.com/IBM-Swift/swift-buildpack/releases/tag/2.1.0).
+The latest version of the IBM Cloud buildpack for Swift on the IBM Cloud is [v2.1.1](https://github.com/IBM-Swift/swift-buildpack/releases/tag/2.1.1).
 
 Please note that it is possible that the latest buildpack code contained in this repo hasn't yet been installed on the IBM Cloud. If that happens to be the case and you'd like to leverage the latest buildpack code, you can do so by adding the `-b https://github.com/IBM-Swift/swift-buildpack` parameter to the `ibmcloud app push` command, as shown below:
 
@@ -400,17 +400,17 @@ Admin tasks
 To install this buildpack:
 
 ```shell
-wget https://github.com/IBM-Swift/swift-buildpack/releases/download/2.1.0/buildpack_swift_v2.1.1-20190805-1547.zip
-ibmcloud cf create-buildpack swift_buildpack buildpack_swift_v2.1.1-20190805-1547.zip <position>
+wget https://github.com/IBM-Swift/swift-buildpack/releases/download/2.1.1/buildpack_swift_v2.1.1-20190821-1902.zip
+ibmcloud cf create-buildpack swift_buildpack uildpack_swift_v2.1.1-20190821-1902.zip <position>
 ```
 
 **Position** is a positive integer, sets priority, and is sorted from lowest to highest when listed using the `ibmcloud cf buildpacks` command.
 
 And to update it:
 
 ```shell
-wget https://github.com/IBM-Swift/swift-buildpack/releases/download/2.1.1/buildpack_swift_v2.1.1-20190805-1547.zip
-ibmcloud cf update-buildpack swift_buildpack -p buildpack_swift_v2.1.1-20190805-1547.zip
+wget https://github.com/IBM-Swift/swift-buildpack/releases/download/2.1.1/buildpack_swift_v2.1.1-20190821-1902.zip
+ibmcloud cf update-buildpack swift_buildpack -p uildpack_swift_v2.1.1-20190821-1902.zip
 ```
 
 For more details on installing buildpacks, see [Adding buildpacks to Cloud Foundry](https://docs.cloudfoundry.org/adminguide/buildpacks.html).