(#51) Linux: use Bash rather than sh

Author: ForNeVeR

.github/workflows/main.yml

@@ -25,7 +25,7 @@ jobs:
           submodules: true
 
       - name: Install PowerShell
-        run: sh ./linux/install-pwsh.sh
+        run: bash ./linux/install-pwsh.sh
 
       # Build:
       - name: Install