build(ci): use RUST_VERSION for CTS consistently

.github/workflows/ci.yml

@@ -327,11 +327,13 @@ jobs:
       - name: checkout repo
         uses: actions/checkout@v3
 
-      - name: install rust
+      - name: install rust ${{ env.RUST_VERSION }}
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: ${{ env.RUST_VERSION }}
+          override: true
+          components: clippy
 
       - name: disable debug
         shell: bash

.github/workflows/cts.yml

@@ -9,6 +9,7 @@ on:
 
 env:
   RUST_BACKTRACE: 1
+  RUST_VERSION: 1.64
 
 jobs:
   cts:
@@ -46,12 +47,13 @@ jobs:
           cd cts
           git checkout $(cat ../wgpu/cts_runner/revision.txt)
 
-      - name: install rust
+      - name: install rust ${{ env.RUST_VERSION }}
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: stable
+          toolchain: ${{ env.RUST_VERSION }}
           target: ${{ matrix.target }}
           profile: minimal
+          override: true
 
       - name: caching
         uses: Swatinem/rust-cache@v1

README.md

@@ -32,7 +32,7 @@ For an overview of all the components in the gfx-rs ecosystem, see [the big pict
 ### MSRV policy
 
 Minimum Supported Rust Version is **1.64**.
-It is enforced on CI (in "/.github/workflows/ci.yml") with `RUST_VERSION` variable.
+It is enforced on CI (in "/.github/workflows/ci.yml", "/.github/workflows/cts.yml") with `RUST_VERSION` variable.
 This version can only be upgraded in breaking releases.
 
 ## Getting Started