build(deps): bump actions/cache from 4 to 5 (#2103)

Bumps [actions/cache](https://github.com/actions/cache) from 4 to 5.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v4...v5)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '5'
  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>
Co-authored-by: Robert Anderson <randerson@duckduckgo.com>

Author: dependabot[bot]

.github/workflows/build-pr.yml

@@ -19,7 +19,7 @@ jobs:
               uses: actions/setup-node@v6
               with:
                   node-version-file: '.nvmrc'
-            - uses: actions/cache@v4
+            - uses: actions/cache@v5
               with:
                   path: ~/.npm
                   key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}

.github/workflows/snapshots-update.yml

@@ -32,7 +32,7 @@ jobs:
               uses: actions/setup-node@v6
               with:
                   node-version-file: '.nvmrc'
-            - uses: actions/cache@v4
+            - uses: actions/cache@v5
               with:
                   path: |
                       ~/.npm

.github/workflows/snapshots.yml

@@ -25,7 +25,7 @@ jobs:
               uses: actions/setup-node@v6
               with:
                   node-version-file: '.nvmrc'
-            - uses: actions/cache@v4
+            - uses: actions/cache@v5
               with:
                   path: |
                       ~/.npm

.github/workflows/tests.yml

@@ -25,7 +25,7 @@ jobs:
               uses: actions/setup-node@v6
               with:
                   node-version-file: '.nvmrc'
-            - uses: actions/cache@v4
+            - uses: actions/cache@v5
               with:
                   path: ~/.npm
                   key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
@@ -47,7 +47,7 @@ jobs:
               uses: actions/setup-node@v6
               with:
                   node-version-file: '.nvmrc'
-            - uses: actions/cache@v4
+            - uses: actions/cache@v5
               with:
                   path: ~/.npm
                   key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
@@ -59,7 +59,7 @@ jobs:
                   npm run build
             - name: Cache docs output
               id: docs-output
-              uses: actions/cache@v4
+              uses: actions/cache@v5
               with:
                   path: docs
                   key: docs-output-${{ github.run_id }}
@@ -96,7 +96,7 @@ jobs:
                   node-version-file: '.nvmrc'
             - name: Cache build outputs
               id: docs-output
-              uses: actions/cache@v4
+              uses: actions/cache@v5
               with:
                   path: docs
                   key: docs-output-${{ github.run_id }}