Update taiki-e/install-action digest to 64e4e2f (#6019)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [taiki-e/install-action](https://togithub.com/taiki-e/install-action)
| action | digest | [`2335425` ->
`64e4e2f`](https://togithub.com/taiki-e/install-action/compare/2335425...64e4e2f)
|

---

### Configuration

📅 **Schedule**: Branch creation - "after 8pm,before 6am" in timezone
America/Los_Angeles, Automerge - "after 8pm,before 6am" in timezone
America/Los_Angeles.

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

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.github/workflows/hakari.yml

@@ -24,7 +24,7 @@ jobs:
         with:
           toolchain: stable
       - name: Install cargo-hakari
-        uses: taiki-e/install-action@2335425120e645291d84cec8194c63983a0c8ee5 # v2
+        uses: taiki-e/install-action@64e4e2f995104968c78bd697b253d55bf557af66 # v2
         with:
           tool: cargo-hakari
       - name: Check workspace-hack Cargo.toml is up-to-date