fix(ci): add single quotes

Author: VeryBaaad

.github/workflows/ci.yml

@@ -45,13 +45,13 @@ jobs:
           cache-all-crates: "true"
 
       - name: Build
-        if: matrix.os == windows-latest
+        if: matrix.os == 'windows-latest'
         run: |
           rc randfill.rc
           cargo rustc --release --target ${{ matrix.target }} --bin randfill -- -C link-arg=/INPUT:randfill.res
 
       - name: Build
-        if: matrix.os != windows-latest
+        if: matrix.os != 'windows-latest'
         run: |
           cargo build --release --all-targets --all-features --workspace --target ${{ matrix.target }}