Specify toolchain version with with

Using dtolnay/[email protected] makes dependabot keen to update it;
use dtolnay/rust-toolchain@master master instead with a toolchain
specifier so it doesn't

Signed-off-by: Sjoerd Simons <[email protected]>

.github/workflows/ci.yml

@@ -16,35 +16,41 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/[email protected]
+      - uses: dtolnay/rust-toolchain@master # avoid the tag here to prevent dependabot from updating it
+        with:
+            toolchain: "1.70"
       - run: cargo check --all-targets --all-features
 
   fmt:
     name: cargo fmt
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@1.70
+      - uses: dtolnay/rust-toolchain@master # avoid the tag here to prevent dependabot from updating it
         with:
-          components: rustfmt
+            toolchain: "1.70"
+            components: rustfmt
       - run: cargo fmt --all --check
 
   test:
     name: cargo test
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/[email protected]
+      - uses: dtolnay/rust-toolchain@master # avoid the tag here to prevent dependabot from updating it
+        with:
+            toolchain: "1.70"
       - run: cargo test --all-targets --all-features
 
   clippy:
     name: cargo clippy
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@1.70
+      - uses: dtolnay/rust-toolchain@master # avoid the tag here to prevent dependabot from updating it
         with:
-          components: clippy
+            toolchain: "1.70"
+            components: clippy
       - run: cargo clippy --all-targets --all-features -- -D warnings
 
   clippy-latest: