ci: Fix cfg flag from madsim to msim

The fork uses --cfg msim, not --cfg madsim (the upstream name).
Without this, the sim variants of clippy/build/test/bench/doc
were not actually compiling the simulator code.

Author: Xanewok

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
       - name: Clippy sim
         run: cargo clippy -- -D warnings
         env:
-          RUSTFLAGS: "--cfg madsim"
+          RUSTFLAGS: "--cfg msim"
 
   build:
     runs-on: ubuntu-latest
@@ -35,7 +35,7 @@ jobs:
       - name: Build sim
         run: cargo build
         env:
-          RUSTFLAGS: "--cfg madsim"
+          RUSTFLAGS: "--cfg msim"
 
   test:
     runs-on: ubuntu-latest
@@ -47,8 +47,8 @@ jobs:
       - name: Test sim
         run: cargo test --release --no-fail-fast
         env:
-          RUSTFLAGS: "--cfg madsim"
-          RUSTDOCFLAGS: "--cfg madsim"
+          RUSTFLAGS: "--cfg msim"
+          RUSTDOCFLAGS: "--cfg msim"
 
   bench:
     runs-on: ubuntu-latest
@@ -58,7 +58,7 @@ jobs:
       - name: Bench
         run: cargo bench -p msim
         env:
-          RUSTFLAGS: "--cfg madsim"
+          RUSTFLAGS: "--cfg msim"
 
   doc:
     runs-on: ubuntu-latest
@@ -68,5 +68,5 @@ jobs:
       - name: Doc
         run: cargo doc --no-deps
         env:
-          RUSTFLAGS: "--cfg madsim"
-          RUSTDOCFLAGS: "--cfg madsim --cfg docsrs"
+          RUSTFLAGS: "--cfg msim"
+          RUSTDOCFLAGS: "--cfg msim --cfg docsrs"