Bump actions-rust-lang/setup-rust-toolchain from 1.15.2 to 1.15.3 (#272)

Bumps [actions-rust-lang/setup-rust-toolchain](https://github.com/actions-rust-lang/setup-rust-toolchain) from 1.15.2 to 1.15.3.
- [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@1780873...a0b538f)

---
updated-dependencies:
- dependency-name: actions-rust-lang/setup-rust-toolchain
  dependency-version: 1.15.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/submodule_tracker.yml

@@ -35,7 +35,7 @@ jobs:
             echo submodule_has_update="true" >> $GITHUB_OUTPUT;
           fi
       - if: ${{ steps.submodule-diff.outputs.submodule_has_update == 'true'}}
-        uses: actions-rust-lang/setup-rust-toolchain@1780873c7b576612439a134613cc4cc74ce5538c # v1.15.2
+        uses: actions-rust-lang/setup-rust-toolchain@a0b538fa0b742a6aa35d6e2c169b4bd06d225a98 # v1.15.3
       - if: ${{ steps.submodule-diff.outputs.submodule_has_update == 'true'}}
         working-directory: ./binding
         run: make generate