install rustfmt component

Author: Mark-Simulacrum

.github/workflows/bors.yml

@@ -13,7 +13,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Install Rust nightly
-        run: rustup update --no-self-update nightly && rustup default nightly
+        run: rustup update nightly && rustup default nightly && rustup component add rustfmt clippy
 
       - name: Check the code formatting with rustfmt
         run: cargo fmt --all -- --check

.github/workflows/pr.yml

@@ -9,7 +9,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Install Rust nightly
-        run: rustup update nightly && rustup default nightly
+        run: rustup update nightly && rustup default nightly && rustup component add rustfmt clippy
 
       - name: Check the code formatting with rustfmt
         run: cargo fmt --all -- --check