update rust toolchain to 1.77.2, "latest" that still has Windows 7 compatibility

Author: itsneufox

.github/workflows/build.yml

@@ -22,7 +22,7 @@ jobs:
 
       - uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
-          toolchain: nightly-2024-01-01  # Specific nightly version that works with dll-syringe, remove when it gets fixed so we can use latest
+          toolchain: 1.77.2  # Last Rust version to support Windows 7, newer versions require Windows 8+
 
       - name: Install frontend dependencies
         run: yarn install