Actually run CI linting with nightly (#274)

Previously the rust linting workflow downloaded nightly but didn't use it. This made the CI `fmt` checks to generate warnings since we use nightly `rustfmt` configs.

.github/workflows/rust.yml

@@ -24,10 +24,10 @@ jobs:
         uses: Swatinem/rust-cache@v2
 
       - name: Run cargo fmt
-        run: cargo fmt --all --check
+        run: cargo +nightly fmt --all --check
 
       - name: Run cargo clippy
-        run: cargo clippy --all-targets
+        run: cargo +nightly clippy --all-targets
         env:
           PWD: ${{ github.workspace }} # without it ci can't see env!("PWD")
 

.rustfmt.toml

@@ -10,4 +10,4 @@ newline_style = "Unix"
 format_code_in_doc_comments = true
 
 # macros
-format_macro_matchers = true
+format_macro_matchers = true

rust-toolchain.toml

@@ -1,4 +1,4 @@
 [toolchain]
 channel = "1.74.1"
 components = [ "rustfmt", "clippy" ]
-profile = "default"
+profile = "default"