Switch to nightly rustc for OsStr::truncate

Author: MonterraByte

.github/workflows/ci.yaml

@@ -5,7 +5,7 @@ jobs:
   fmt:
     runs-on: ubuntu-latest
     steps:
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@nightly
         with:
           components: rustfmt
       - uses: r7kamura/rust-problem-matchers@v1
@@ -17,7 +17,7 @@ jobs:
     env:
       RUSTFLAGS: -D warnings
     steps:
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@nightly
       - uses: r7kamura/rust-problem-matchers@v1
       - uses: actions/checkout@v6
       - run: cargo check --workspace --all-targets
@@ -27,7 +27,7 @@ jobs:
     env:
       RUSTFLAGS: -D warnings
     steps:
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@nightly
         with:
           components: clippy
       - uses: r7kamura/rust-problem-matchers@v1
@@ -37,7 +37,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@nightly
       - uses: r7kamura/rust-problem-matchers@v1
       - uses: actions/checkout@v6
       - run: cargo test --workspace

rust-toolchain.toml

@@ -0,0 +1,2 @@
+[toolchain]
+channel = "nightly"