feat: extend semantic-release workflow to support alpha and beta branches

- Updated GitHub Actions workflow to trigger releases on `alpha` and `beta` branches in addition to `main`.
- Fixed minor README typo for improved clarity in the beta testing section.

Issue NMO-670, NMO-648, NMO-693

Author: RedLeader962

.github/workflows/semantic_release.yml

@@ -23,6 +23,8 @@ on:
   push:
     branches:
       - main
+      - alpha
+      - beta
 
 permissions:
   contents: read # for checkout

README.md

@@ -94,7 +94,7 @@ dnp up
 dnp down 
 ```
 
-### For beta tester or just to dry-run a DNP in an throwaway project
+### For beta tester or just to dry-run DNP in an throwaway project
 ```shell
 # CLone dockerized-norlab-project-mock-EMPTY
 git clone https://github.com/norlab-ulaval/dockerized-norlab-project-mock-EMPTY.git