Enable unsecure commands on ci (#53)

* enable unsecure commands on ci

* add env var

Author: miquelbeltran

.github/workflows/all_plugins.yaml

@@ -1,5 +1,8 @@
 name: all_plugins
 
+env:
+  ACTIONS_ALLOW_UNSECURE_COMMANDS: 'true'
+
 on:
   pull_request:
   push:

.github/workflows/scripts/install-flutter.sh

@@ -10,4 +10,4 @@ then
 fi
 
 git clone https://github.com/flutter/flutter.git --depth 1 -b $BRANCH _flutter
-echo "::add-path::$GITHUB_WORKSPACE/_flutter/bin"
+echo "::add-path::$GITHUB_WORKSPACE/_flutter/bin"