Use unreleased RustPython

With latest RustPython, it is possible to use latest Rust also.

Author: olivierlemasle

.github/workflows/e2e.yml

@@ -31,9 +31,7 @@ jobs:
           cache: pnpm
 
       - name: Install Rust stable
-        uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: "1.75.0"
+        uses: dtolnay/rust-toolchain@stable
 
       - name: Setup Rust cache
         uses: swatinem/rust-cache@v2

.github/workflows/format-and-lint.yml

@@ -16,9 +16,8 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Install rustfmt with stable toolchain
-        uses: dtolnay/rust-toolchain@master
+        uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: "1.75.0"
           components: rustfmt
 
       - uses: Swatinem/rust-cache@v2
@@ -41,9 +40,8 @@ jobs:
           sudo apt-get install -y webkit2gtk-4.1
 
       - name: Install clippy with stable toolchain
-        uses: dtolnay/rust-toolchain@master
+        uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: "1.75.0"
           components: clippy
 
       - uses: Swatinem/rust-cache@v2

.github/workflows/test.yml

@@ -24,9 +24,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Install stable toolchain
-        uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: "1.75.0"
+        uses: dtolnay/rust-toolchain@stable
 
       - name: Install Linux dependencies
         if: matrix.os == 'ubuntu-latest'