fix: display actual values for disk space checks in installer script

scripts/install.sh

@@ -30,7 +30,7 @@ WARNING_SPACE=false
 
 if [ "$TOTAL_SPACE" -lt "$REQUIRED_TOTAL_SPACE" ]; then
     WARNING_SPACE=true
-    cat << 'EOF'
+    cat << EOF
 WARNING: Insufficient total disk space!
 
 Total disk space:     ${TOTAL_SPACE}GB
@@ -41,7 +41,7 @@ EOF
 fi
 
 if [ "$AVAILABLE_SPACE" -lt "$REQUIRED_AVAILABLE_SPACE" ]; then
-    cat << 'EOF'
+    cat << EOF
 WARNING: Insufficient available disk space!
 
 Available disk space:   ${AVAILABLE_SPACE}GB