Fix some CI issues

Author: LegNeato

.github/workflows/ci.yaml

@@ -156,8 +156,10 @@ jobs:
         run: cargo fetch --locked
       - name: Rustfmt
         run: cargo fmt --all -- --check
-      - name: Rustfmt tests
-        run: rustfmt --check tests/ui/**/*.rs
+      - name: Rustfmt compiletests
+        run: rustfmt --check tests/compiletests/ui/**/*.rs
+      - name: Rustfmt difftests
+        run: rustfmt --check tests/difftests/pipelines/**/*.rs
       - name: Check docs are valid
         run: RUSTDOCFLAGS=-Dwarnings cargo doc --no-deps
       - name: Check docs for `spirv-std` and `spirv-builder` on stable (for docs.rs)

tests/compiletests/src/main.rs

@@ -31,7 +31,7 @@ const SPIRV_TARGET_PREFIX: &str = "spirv-unknown-";
 
 fn target_spec_json(target: &str) -> String {
     format!(
-        "{}/../crates/spirv-builder/target-specs/{target}.json",
+        "{}/../../crates/spirv-builder/target-specs/{target}.json",
         env!("CARGO_MANIFEST_DIR")
     )
 }