ci: cargo test -- --include-ignored has been stabilized

rust-lang/rust#80053

Author: dkim

.github/workflows/build.yml

@@ -30,7 +30,7 @@ jobs:
       uses: actions-rs/cargo@v1
       with:
         command: test
-        args: --verbose --workspace --all-targets -- -Z unstable-options --include-ignored
+        args: --verbose --workspace --all-targets -- --include-ignored
     # `cargo test --all-targets` does not run doctest: https://github.com/rust-lang/cargo/issues/6669.
     - name: cargo test (doc)
       uses: actions-rs/cargo@v1
@@ -56,7 +56,7 @@ jobs:
       uses: actions-rs/cargo@v1
       with:
         command: test
-        args: --verbose --workspace --all-targets -- -Z unstable-options --include-ignored
+        args: --verbose --workspace --all-targets -- --include-ignored
     # `cargo test --all-targets` does not run doctest: https://github.com/rust-lang/cargo/issues/6669.
     - name: cargo test (doc)
       uses: actions-rs/cargo@v1