chore(deps): bump GHA actions — cache@v5, release-please-action@v5, action-gh-release@v3

All three majors are clean drop-in upgrades; the only breaking change in
each is the bump from the Node 20 to Node 24 Actions runtime. The
GitHub-hosted runners we use (ubuntu-latest / macos-14 / windows-latest)
already ship the required runner version (>= 2.327.1).

- actions/cache@v4 → v5 (ci.yml + release.yml hyperd binary cache)
- googleapis/release-please-action@v4 → v5 (release-please.yml)
- softprops/action-gh-release@v2 → v3 (release.yml GitHub Release publish)

`actions-rust-lang/setup-rust-toolchain@v1`, `actions/checkout@v4`,
`actions/upload-artifact@v4`, `actions/download-artifact@v4`, and
`actions/setup-node@v4` are intentionally left as-is — `@v1`/`@v4`
floating tags already pull the latest within-major release.

release-please-config.json schema is unchanged between v4 and v5; no
config migration needed.

Author: StefanSteiner

.github/workflows/ci.yml

@@ -124,7 +124,7 @@ jobs:
         # (hyperdb-bootstrap/hyperd-version.toml) invalidates the cache
         # automatically and the next run re-downloads.
         id: hyperd-cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: .hyperd
           key: hyperd-${{ runner.os }}-${{ runner.arch }}-${{ hashFiles('hyperdb-bootstrap/hyperd-version.toml') }}

.github/workflows/release-please.yml

@@ -31,7 +31,7 @@ jobs:
   release-please:
     runs-on: ubuntu-latest
     steps:
-      - uses: googleapis/release-please-action@v4
+      - uses: googleapis/release-please-action@v5
         with:
           config-file: release-please-config.json
           manifest-file: .release-please-manifest.json

.github/workflows/release.yml

@@ -64,7 +64,7 @@ jobs:
 
       - name: Cache hyperd binary
         id: hyperd-cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: .hyperd
           key: hyperd-${{ runner.os }}-${{ runner.arch }}-${{ hashFiles('hyperdb-bootstrap/hyperd-version.toml') }}
@@ -163,7 +163,7 @@ jobs:
           publish sea-query-hyperdb
 
       - name: Create GitHub release
-        uses: softprops/action-gh-release@v2
+        uses: softprops/action-gh-release@v3
         with:
           tag_name: ${{ steps.tag.outputs.name }}
           prerelease: ${{ contains(steps.tag.outputs.name, '-rc.') || contains(steps.tag.outputs.name, '-alpha.') || contains(steps.tag.outputs.name, '-beta.') }}