chore(deps): bump dtolnay/rust-toolchain from 1.71.1 to 1.90.0

Bumps [dtolnay/rust-toolchain](https://github.com/dtolnay/rust-toolchain) from 1.71.1 to 1.90.0.
- [Release notes](https://github.com/dtolnay/rust-toolchain/releases)
- [Commits](dtolnay/rust-toolchain@1.71.1...1.90.0)

---
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/build-kotlin.yml

@@ -33,7 +33,7 @@ jobs:
           version: "${{ env.PROTOC_VERSION }}"
 
       - name: Rust setup (1.71.1)
-        uses: dtolnay/rust-toolchain@1.71.1
+        uses: dtolnay/rust-toolchain@1.90.0
         with:
           components: rustfmt, clippy
 

.github/workflows/release.yml

@@ -34,7 +34,7 @@ jobs:
 
       # use MSRV
       - name: Set Rust version to MSRV 1.71.1
-        uses: dtolnay/rust-toolchain@1.71.1
+        uses: dtolnay/rust-toolchain@1.90.0
         with:
           # Add armv7, aarch64, i686, x86_64 targets
           targets: armv7-linux-androideabi, aarch64-linux-android, i686-linux-android, x86_64-linux-android