Remove reference to ESMF forum (#311)

* Remove reference to ESMF forum

* Update upload-artifact GitHub action version

Author: atextor

.github/workflows/pull-request-check.yml

@@ -70,7 +70,7 @@ jobs:
         zip -r ../SAMM-snapshot-specification.zip SAMM-snapshot
 
     - name: Upload build artifacts
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       if: env.ONLY_MD != 'true'
       with:
         name: samm-artifacts

CONTRIBUTING.md

@@ -15,8 +15,7 @@ Framework](https://projects.eclipse.org/projects/dt.esmf/).
 
 # Contributing Source Code and Technical Specifications for this Project (using GitHub)
 * We use this GitHub repository to track issues and feature requests.
-* For general discussions of the ESMF, modeling questions etc. we use the [community
-  forum](https://www.eclipse.org/forums/index.php/f/617/).
+* For general discussions of the ESMF, modeling questions etc. we use the [ESMF Chat](https://chat.eclipse.org/#/room/#eclipse-semantic-modeling-framework:matrix.eclipse.org).
 * Opening `Issues` and `PRs` in GitHub is the preferred way to interact with the community around
   this repository and the Semantic Aspect Meta Model.
 * For deeper discussions specific to development, there is also the [developer mailing

README.md

@@ -52,7 +52,7 @@ SAMM uses semantic versioning (`major.minor.micro`) with the following rules:
 Are you having trouble with Semantic Aspect Meta Model? We want to help!
 
 * Check the reference [documentation](https://eclipse-esmf.github.io/samm-specification/snapshot/index.html).
-* Ask a question the [community forum](https://www.eclipse.org/forums/index.php/f/617/).
+* Ask a question the [ESMF Chat](https://chat.eclipse.org/#/room/#eclipse-semantic-modeling-framework:matrix.eclipse.org).
 * Having issues with SAMM? Open a [GitHub issue]( https://github.com/eclipse-esmf/esmf-semantic-aspect-meta-model/issues).
 
 ## Build and contribute