Update actions/checkout to v7.

Author: orium

.github/workflows/ci.yml

@@ -47,7 +47,7 @@ jobs:
           cargo install taplo-cli
 
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Check everything
         run: bash ./tools/check.sh basic doc_url_links unused_deps packaging fmt toml_fmt readme
@@ -70,7 +70,7 @@ jobs:
         run: cargo install cargo-msrv
 
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Check the minimum supported rust version
         run: bash ./tools/check.sh msrv
@@ -85,7 +85,7 @@ jobs:
           components: clippy
 
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Run clippy
         run: bash ./tools/check.sh clippy

.github/workflows/release.yml

@@ -20,9 +20,6 @@ jobs:
           - target: x86_64-unknown-linux-musl
             os: ubuntu-latest
             zip: none
-          - target: x86_64-apple-darwin
-            os: macos-13
-            zip: all
           - target: aarch64-apple-darwin
             os: macos-14
             zip: all
@@ -31,7 +28,7 @@ jobs:
             zip: all
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - uses: taiki-e/upload-rust-binary-action@v1
         with: