Bump dtolnay/rust-toolchain from 1.82.0 to 1.100.0

Bumps [dtolnay/rust-toolchain](https://github.com/dtolnay/rust-toolchain) from 1.82.0 to 1.100.0.
- [Release notes](https://github.com/dtolnay/rust-toolchain/releases)
- [Commits](dtolnay/rust-toolchain@1.82.0...1.100.0)

---
updated-dependencies:
- dependency-name: dtolnay/rust-toolchain
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/coverage.yml

@@ -18,7 +18,7 @@ jobs:
         uses: actions/checkout@v4
       - name: Install stable toolchain
         # tarpaulin is currently broken for Rust 1.83, see #1657
-        uses: dtolnay/rust-toolchain@1.82.0
+        uses: dtolnay/rust-toolchain@1.100.0
       - uses: Swatinem/rust-cache@v2
       - name: Install tarpaulin
         uses: taiki-e/install-action@v2