Change version to 0.1.1

Change Version to 0.1.1 and replaced the screenshot with a screenshot of the specific version.

The Version-Change is made in `extension.json` (for MediaWiki itself to show the version directly) and in `CITATION.cff` (for the citation system in GitHub).

The version change is made as some things have changed, but not things that are so drastic that it should be a change in the minor number.

Author: QuickWrite

CITATION.cff

@@ -17,5 +17,5 @@ message: |
     "If you use this software, please cite it using these metadata.
     You could use your own citation, but this is in many cases easier to use."
 title: MultiCodeBlock
-version: "0.1.0"
-...
+version: "0.1.1"
+...

extension.json

@@ -3,7 +3,7 @@
 	"author": "QuickWrite",
 	"url": "https://github.com/QuickWrite/MultiCodeBlock",
 	"description": "Creates a codeblock consisting of multiple languages and a custom way of commenting the code.",
-	"version": "0.1.0",
+	"version": "0.1.1",
 	"license-name": "Apache-2.0",
 	"type": "validextensionclass",
 	"manifest_version": 1,