ci: chmod go-w ~/.cache before pkg commands (sr.ht cache is group-writable)

ober

5db1a4e2cd38cdb262a8dd6ca3178926daed77ad

diff --git a/.build.yml b/.build.yml
index a0c4fdf..90c2701 100644
--- a/.build.yml
+++ b/.build.yml
@@ -69,7 +69,8 @@ tasks:
   - package: |
       cd jerboa-browser
       J="$HOME/jerboa/bin/jerboa"
-      SCHEME="$(command -v scheme)" "$J" pkg verify
+      SCHEME="$(command -v scheme)" chmod -R go-w "$HOME/.cache"
+      "$J" pkg verify
       SCHEME="$(command -v scheme)" "$J" pkg policy
       SCHEME="$(command -v scheme)" "$J" pkg build
       SCHEME="$(command -v scheme)" "$J" pkg pack --output "$PWD/jerboa-browser-0.1.0.jpkg"