chore: bump actions-rust-lang/setup-rust-toolchain in the minor group

Bumps the minor group with 1 update: [actions-rust-lang/setup-rust-toolchain](https://github.com/actions-rust-lang/setup-rust-toolchain).


Updates `actions-rust-lang/setup-rust-toolchain` from 1.12.0 to 1.15.0
- [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@v1.12.0...v1.15.0)

---
updated-dependencies:
- dependency-name: actions-rust-lang/setup-rust-toolchain
  dependency-version: 1.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/_code.yml

@@ -11,7 +11,7 @@ jobs:
         uses: actions/checkout@v4.2.2
 
       - name: Install stable toolchain
-        uses: actions-rust-lang/setup-rust-toolchain@v1.12.0
+        uses: actions-rust-lang/setup-rust-toolchain@v1.15.0
         with:
           components: clippy,rustfmt
 
@@ -37,7 +37,7 @@ jobs:
         uses: actions/checkout@v4.2.2
 
       - name: Install stable toolchain
-        uses: actions-rust-lang/setup-rust-toolchain@v1.12.0
+        uses: actions-rust-lang/setup-rust-toolchain@v1.15.0
 
       - name: Run Tests
         run: >

.github/workflows/_release.yml

@@ -16,7 +16,7 @@ jobs:
           sudo apt-get install -y musl-tools
 
       - name: Install rust
-        uses: actions-rust-lang/setup-rust-toolchain@v1.12.0
+        uses: actions-rust-lang/setup-rust-toolchain@v1.15.0
         with:
           target: x86_64-unknown-linux-musl