chore: update Rust toolchain to version 1.89.0 in README and CI configuration

.github/workflows/build-and-test.yml

@@ -45,7 +45,7 @@ jobs:
       - name: Install Rust
         uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: "1.81.0"
+          toolchain: "1.89.0"
           targets: ${{ matrix.target }}
       - name: Build
         run: cargo build --target ${{ matrix.target }}
@@ -63,7 +63,7 @@ jobs:
       - name: Install Rust
         uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: "1.81.0"
+          toolchain: "1.89.0"
           targets: ${{ matrix.target }}
       - name: Install Android NDK
         run: cargo install cargo-ndk
@@ -77,7 +77,7 @@ jobs:
       - name: Install Rust toolchain
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: "1.81.0"
+          toolchain: "1.89.0"
           override: true
       - name: Run tests
         run: cargo test
@@ -89,7 +89,7 @@ jobs:
       - name: Install Rust toolchain
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: "1.81.0"
+          toolchain: "1.89.0"
           override: true
       - name: Run tests
         run: cargo test
@@ -101,7 +101,7 @@ jobs:
       - name: Install Rust toolchain
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: "1.81.0"
+          toolchain: "1.89.0"
           override: true
       - name: Run tests
         run: cargo test

README.md

@@ -9,7 +9,7 @@ This project provides a Rust adapter for compiling and linking [Rapidsnark](http
 ### Rust toolchain
 
 ```
-cargo 1.81.0 (2dbb1af80 2024-08-20)
+cargo 1.89.0 (c24e10642 2025-06-23)
 ```
 
 ## Usage

crates/README.md

@@ -9,7 +9,7 @@ This project provides a Rust adapter for compiling and linking [Rapidsnark](http
 ### Rust toolchain
 
 ```
-cargo 1.81.0 (2dbb1af80 2024-08-20)
+cargo 1.89.0 (c24e10642 2025-06-23)
 ```
 
 ## Usage

rust-toolchain.toml

@@ -1,2 +1,2 @@
 [toolchain]
-channel = "1.81.0"
+channel = "1.89.0"