Bump actions/cache from 5 to 6 in the github-actions group

Bumps the github-actions group with 1 update: [actions/cache](https://github.com/actions/cache).


Updates `actions/cache` from 5 to 6
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v5...v6)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

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

Author: dependabot[bot]

.github/workflows/checks.yml

@@ -24,13 +24,13 @@ jobs:
           toolchain: "1.91.1" # MSRV
 
       - name: Cache cargo registry
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ~/.cargo/registry
           key: ${{ runner.os }}-cargo-registry-${{ steps.toolchain.outputs.cachekey }}-${{ hashFiles('**/Cargo.lock') }}
 
       - name: Cache cargo build
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: target
           key: ${{ runner.os }}-cargo-build-target-${{ steps.toolchain.outputs.cachekey }}-${{ hashFiles('**/Cargo.lock') }}

.github/workflows/release-check.yaml

@@ -10,7 +10,7 @@ jobs:
         id: toolchain
 
       - name: Cache cargo registry
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ~/.cargo/registry
           key: ${{ runner.os }}-cargo-registry-${{ steps.toolchain.outputs.cachekey }}-${{ hashFiles('**/Cargo.lock') }}

.github/workflows/tests.yaml

@@ -50,13 +50,13 @@ jobs:
         id: toolchain
 
       - name: Cache cargo registry
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ~/.cargo/registry
           key: ${{ runner.os }}-cargo-registry-${{ steps.toolchain.outputs.cachekey }}-${{ hashFiles('**/Cargo.lock') }}
 
       - name: Cache cargo build
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: target
           key: ${{ runner.os }}-cargo-build-target-${{ steps.toolchain.outputs.cachekey }}-${{ hashFiles('**/Cargo.lock') }}
@@ -77,13 +77,13 @@ jobs:
         id: toolchain
 
       - name: Cache cargo registry
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ~/.cargo/registry
           key: ${{ runner.os }}-cargo-registry-${{ steps.toolchain.outputs.cachekey }}-${{ hashFiles('**/Cargo.lock') }}
 
       - name: Cache cargo build
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: target
           key: ${{ runner.os }}-cargo-build-target-${{ steps.toolchain.outputs.cachekey }}-${{ hashFiles('**/Cargo.lock') }}
@@ -109,13 +109,13 @@ jobs:
           toolchain: "1.91.1" # MSRV
 
       - name: Cache cargo registry
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ~/.cargo/registry
           key: ${{ runner.os }}-cargo-registry-${{ steps.toolchain.outputs.cachekey }}-${{ hashFiles('**/Cargo.lock') }}
 
       - name: Cache cargo build
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: target
           key: ${{ runner.os }}-cargo-build-target-${{ steps.toolchain.outputs.cachekey }}-${{ hashFiles('**/Cargo.lock') }}