ci: Bump rust toolchain to 1.83

Matching Debian testing

Author: ColinKinloch

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master # avoid the tag here to prevent dependabot from updating it
         with:
-          toolchain: "1.70"
+          toolchain: "1.83"
       - run: cargo check --all-targets --all-features
 
   fmt:
@@ -28,7 +28,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master # avoid the tag here to prevent dependabot from updating it
         with:
-          toolchain: "1.70"
+          toolchain: "1.83"
           components: rustfmt
       - run: cargo fmt --all --check
 
@@ -39,7 +39,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master # avoid the tag here to prevent dependabot from updating it
         with:
-          toolchain: "1.70"
+          toolchain: "1.83"
       - run: cargo test --all-targets --all-features
 
   clippy:
@@ -49,7 +49,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master # avoid the tag here to prevent dependabot from updating it
         with:
-          toolchain: "1.70"
+          toolchain: "1.83"
           components: clippy
       - run: cargo clippy --all-targets --all-features -- -D warnings