Fix CirrusCI

Author: bjorn3

.cirrus.yml

@@ -1,9 +1,9 @@
 task:
   name: freebsd
   freebsd_instance:
-    image: freebsd-13-1-release-amd64
+    image: freebsd-13-2-release-amd64
   setup_rust_script:
-    - pkg install -y curl git bash
+    - pkg install -y git bash
     - curl https://sh.rustup.rs -sSf --output rustup.sh
     - sh rustup.sh --default-toolchain none -y --profile=minimal
   target_cache: