build(deps): bump actions-rust-lang/setup-rust-toolchain

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] <support@github.com>

Author: dependabot[bot]

.github/workflows/rs_ci.yml

@@ -44,7 +44,7 @@ jobs:
           unzip "protoc-${{ env.PB_VERSION }}-${{ env.PB_TARGET }}.zip" -d "$HOME/.local"
           export PATH="$PATH:$HOME/.local/bin"
 
-      - uses: actions-rust-lang/setup-rust-toolchain@v1.15.3
+      - uses: actions-rust-lang/setup-rust-toolchain@v1.15.4
         with:
           cache: false
       - uses: mozilla-actions/sccache-action@v0.0.9
@@ -72,7 +72,7 @@ jobs:
           unzip "protoc-${{ env.PB_VERSION }}-${{ env.PB_TARGET }}.zip" -d "$HOME/.local"
           export PATH="$PATH:$HOME/.local/bin"
 
-      - uses: actions-rust-lang/setup-rust-toolchain@v1.15.3
+      - uses: actions-rust-lang/setup-rust-toolchain@v1.15.4
         with:
           components: clippy
           cache: false
@@ -104,7 +104,7 @@ jobs:
           unzip "protoc-${{ env.PB_VERSION }}-${{ env.PB_TARGET }}.zip" -d "$HOME/.local"
           export PATH="$PATH:$HOME/.local/bin"
 
-      - uses: actions-rust-lang/setup-rust-toolchain@v1.15.3
+      - uses: actions-rust-lang/setup-rust-toolchain@v1.15.4
         with:
           cache: false
       - uses: mozilla-actions/sccache-action@v0.0.9
@@ -132,7 +132,7 @@ jobs:
           unzip "protoc-${{ env.PB_VERSION }}-${{ env.PB_TARGET }}.zip" -d "$HOME/.local"
           export PATH="$PATH:$HOME/.local/bin"
 
-      - uses: actions-rust-lang/setup-rust-toolchain@v1.15.3
+      - uses: actions-rust-lang/setup-rust-toolchain@v1.15.4
         with:
           cache: false
       - uses: taiki-e/install-action@v2
@@ -150,7 +150,7 @@ jobs:
         os: [ubuntu-22.04, macos-latest]
     steps:
       - uses: actions/checkout@v6.0.2
-      - uses: actions-rust-lang/setup-rust-toolchain@v1.15.3
+      - uses: actions-rust-lang/setup-rust-toolchain@v1.15.4
         with:
           components: rustfmt
           cache: false