ci(deps): Bump actions/cache from 3 to 4

Bumps [actions/cache](https://github.com/actions/cache) from 3 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v3...v4)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -32,7 +32,7 @@ jobs:
         components: clippy, rustfmt
 
     - name: Cache cargo registry
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: |
           ~/.cargo/registry
@@ -70,7 +70,7 @@ jobs:
         components: clippy, rust-src, llvm-tools, rustfmt, rustc-dev
 
     - name: Cache cargo registry
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: |
           ~/.cargo/registry

.github/workflows/docs.yml

@@ -32,7 +32,7 @@ jobs:
         components: rust-docs
 
     - name: Cache cargo registry
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: |
           ~/.cargo/registry

.github/workflows/nightly.yml

@@ -25,7 +25,7 @@ jobs:
         components: clippy, rust-src, llvm-tools, rustfmt, rustc-dev
 
     - name: Cache cargo registry
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: |
           ~/.cargo/registry
@@ -74,7 +74,7 @@ jobs:
       uses: dtolnay/rust-toolchain@stable
 
     - name: Cache cargo registry
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: |
           ~/.cargo/registry

.github/workflows/release.yml

@@ -58,7 +58,7 @@ jobs:
         targets: ${{ matrix.target }}
 
     - name: Cache cargo registry
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: |
           ~/.cargo/registry
@@ -125,7 +125,7 @@ jobs:
       uses: dtolnay/rust-toolchain@stable
 
     - name: Cache cargo registry
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: |
           ~/.cargo/registry