stable NSIS

.github/workflows/main.yml

@@ -44,9 +44,8 @@ jobs:
         apt install -y -qq php
     - name: Set up NSis
       run: |
-        bash -c 'echo "deb http://ftp.debian.org/debian unstable main contrib non-free" >> /etc/apt/sources.list.d/unstable.list'
         apt-get -y update
-        apt-get -y install -t unstable nsis=3.09-3
+        apt-get -y install nsis=3.08-3
         makensis -VERSION
     - name: Set up ant
       run: |