ci: update freebsd manifest

Author: mgxm

.builds/freebsd.yml

@@ -1,5 +1,4 @@
-arch: x86_64
-image: freebsd
+image: freebsd/latest
 packages:
   - cmake
   - ninja
@@ -15,35 +14,27 @@ tasks:
       cd zig/build
       bin/zig test ../test/behavior.zig
       bin/zig test ../std/special/compiler_rt/index.zig
-      bin/zig test ../std/index.zig
 
       bin/zig test ../test/behavior.zig --library c
       bin/zig test ../std/special/compiler_rt/index.zig --library c
-      bin/zig test ../std/index.zig --library c
 
       bin/zig test ../test/behavior.zig --release-fast
       bin/zig test ../std/special/compiler_rt/index.zig --release-fast
-      bin/zig test ../std/index.zig --release-fast
 
       bin/zig test ../test/behavior.zig --release-fast --library c
       bin/zig test ../std/special/compiler_rt/index.zig --release-fast --library c
-      bin/zig test ../std/index.zig --release-fast --library c
 
       bin/zig test ../test/behavior.zig --release-small --library c
       bin/zig test ../std/special/compiler_rt/index.zig --release-small --library c
-      bin/zig test ../std/index.zig --release-small --library c
 
       bin/zig test ../test/behavior.zig --release-small
       bin/zig test ../std/special/compiler_rt/index.zig --release-small
-      bin/zig test ../std/index.zig --release-small
 
       bin/zig test ../test/behavior.zig --release-safe
       bin/zig test ../std/special/compiler_rt/index.zig --release-safe
-      bin/zig test ../std/index.zig --release-safe
 
       bin/zig test ../test/behavior.zig --release-safe --library c
       bin/zig test ../std/special/compiler_rt/index.zig --release-safe --library c
-      bin/zig test ../std/index.zig --release-safe --library c
       # TODO enable all tests
       #bin/zig build --build-file ../build.zig test
       # TODO integrate with the download page updater and make a