chore(deps): bump actions-rust-lang/setup-rust-toolchain (#151)

Bumps [actions-rust-lang/setup-rust-toolchain](https://github.com/actions-rust-lang/setup-rust-toolchain) from 1.15.3 to 1.15.4.
- [Release notes](https://github.com/actions-rust-lang/setup-rust-toolchain/releases)
- [Changelog](https://github.com/actions-rust-lang/setup-rust-toolchain/blob/main/CHANGELOG.md)
- [Commits](actions-rust-lang/setup-rust-toolchain@v1.15.3...v1.15.4)

---
updated-dependencies:
- dependency-name: actions-rust-lang/setup-rust-toolchain
  dependency-version: 1.15.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -44,7 +44,7 @@ jobs:
       - uses: actions/checkout@v6
 
       - name: Install Rust (${{ matrix.toolchain.name }})
-        uses: actions-rust-lang/[email protected].3
+        uses: actions-rust-lang/[email protected].4
         with:
           toolchain: ${{ matrix.toolchain.version }}
           target: thumbv6m-none-eabi

.github/workflows/coverage.yml

@@ -18,7 +18,7 @@ jobs:
       - uses: actions/checkout@v6
 
       - name: Install Rust
-        uses: actions-rust-lang/[email protected].3
+        uses: actions-rust-lang/[email protected].4
         with:
           components: llvm-tools-preview
 

.github/workflows/lint.yml

@@ -23,7 +23,7 @@ jobs:
       - uses: actions/checkout@v6
 
       - name: Install Rust
-        uses: actions-rust-lang/[email protected].3
+        uses: actions-rust-lang/[email protected].4
         with:
           components: clippy
 
@@ -41,7 +41,7 @@ jobs:
       - uses: actions/checkout@v6
 
       - name: Install Rust (nightly)
-        uses: actions-rust-lang/[email protected].3
+        uses: actions-rust-lang/[email protected].4
         with:
           toolchain: nightly
           components: rustfmt
@@ -55,7 +55,7 @@ jobs:
       - uses: actions/checkout@v6
 
       - name: Install Rust (nightly)
-        uses: actions-rust-lang/[email protected].3
+        uses: actions-rust-lang/[email protected].4
         with:
           toolchain: nightly
           components: rust-docs
@@ -71,7 +71,7 @@ jobs:
       - uses: actions/checkout@v6
 
       - name: Install Rust
-        uses: actions-rust-lang/[email protected].3
+        uses: actions-rust-lang/[email protected].4
         with:
           components: clippy
 

.github/workflows/release.yml

@@ -20,7 +20,7 @@ jobs:
           fetch-depth: 0
 
       - name: Install Rust
-        uses: actions-rust-lang/[email protected].3
+        uses: actions-rust-lang/[email protected].4
 
       - name: release-plz
         uses: MarcoIeni/[email protected]