chore(deps): bump actions/cache from 5.0.5 to 6.1.0 (#1598)

Bumps [actions/cache](https://github.com/actions/cache) from 5.0.5 to 6.1.0.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@27d5ce7...55cc834)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: 6.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/RustNightly.yml

@@ -58,7 +58,7 @@ jobs:
       # rust-cache cleans "anything not a dependency" from target dirs, removing the sysroot.
       # We cache sysroot separately to avoid rebuilding it (~10s) on every run.
       - name: Sysroot cache
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae  # v5.0.5
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9  # v6.1.0
         with:
           path: |
             src/tests/rust_guests/target/sysroot

.github/workflows/dep_build_guests.yml

@@ -62,7 +62,7 @@ jobs:
       # rust-cache cleans "anything not a dependency" from target dirs, removing the sysroot.
       # We cache sysroot separately to avoid rebuilding it (~10s) on every run.
       - name: Sysroot cache
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae  # v5.0.5
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9  # v6.1.0
         with:
           path: |
             src/tests/rust_guests/target/sysroot

.github/workflows/dep_code_checks.yml

@@ -44,7 +44,7 @@ jobs:
       # rust-cache cleans "anything not a dependency" from target dirs, removing the sysroot.
       # We cache sysroot separately to avoid rebuilding it (~10s) on every run.
       - name: Sysroot cache
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae  # v5.0.5
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9  # v6.1.0
         with:
           path: |
             src/tests/rust_guests/target/sysroot
@@ -110,7 +110,7 @@ jobs:
       # rust-cache cleans "anything not a dependency" from target dirs, removing the sysroot.
       # We cache sysroot separately to avoid rebuilding it (~10s) on every run.
       - name: Sysroot cache
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae  # v5.0.5
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9  # v6.1.0
         with:
           path: |
             src/tests/rust_guests/target/sysroot