Bump the github-actions group across 1 directory with 2 updates

Bumps the github-actions group with 2 updates in the / directory: [actions-rust-lang/setup-rust-toolchain](https://github.com/actions-rust-lang/setup-rust-toolchain) and [taiki-e/install-action](https://github.com/taiki-e/install-action).


Updates `actions-rust-lang/setup-rust-toolchain` from 1.15.2 to 1.15.3
- [Release notes](https://github.com/actions-rust-lang/setup-rust-toolchain/releases)
- [Changelog](https://github.com/actions-rust-lang/setup-rust-toolchain/blob/main/CHANGELOG.md)
- [Commits](actions-rust-lang/setup-rust-toolchain@1780873...a0b538f)

Updates `taiki-e/install-action` from 2.68.13 to 2.68.16
- [Release notes](https://github.com/taiki-e/install-action/releases)
- [Changelog](https://github.com/taiki-e/install-action/blob/main/CHANGELOG.md)
- [Commits](taiki-e/install-action@a3324fb...d6e286f)

---
updated-dependencies:
- dependency-name: actions-rust-lang/setup-rust-toolchain
  dependency-version: 1.15.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
- dependency-name: taiki-e/install-action
  dependency-version: 2.68.16
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
...

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

Author: dependabot[bot]

.github/workflows/modgc.yml

@@ -105,7 +105,7 @@ jobs:
           ${SETARCH} ../src/configure -C --disable-install-doc --with-modular-gc="${MODULAR_GC_DIR}" \
           ${arch:+--target=$arch-$OSTYPE --host=$arch-$OSTYPE}
 
-      - uses: actions-rust-lang/setup-rust-toolchain@1780873c7b576612439a134613cc4cc74ce5538c # v1.15.2
+      - uses: actions-rust-lang/setup-rust-toolchain@a0b538fa0b742a6aa35d6e2c169b4bd06d225a98 # v1.15.3
       - name: Set MMTk environment variables
         run: |
           echo 'EXCLUDES=../src/test/.excludes-mmtk' >> $GITHUB_ENV

.github/workflows/zjit-macos.yml

@@ -92,7 +92,7 @@ jobs:
           rustup install ${{ matrix.rust_version }} --profile minimal
           rustup default ${{ matrix.rust_version }}
 
-      - uses: taiki-e/install-action@a3324fb0eb94b8230ec968c3389c1b7929fc2f3b # v2.68.13
+      - uses: taiki-e/install-action@d6e286fa45544157a02d45a43742857ebbc25d12 # v2.68.16
         with:
           tool: nextest@0.9
         if: ${{ matrix.test_task == 'zjit-check' }}

.github/workflows/zjit-ubuntu.yml

@@ -119,7 +119,7 @@ jobs:
           ruby-version: '3.1'
           bundler: none
 
-      - uses: taiki-e/install-action@a3324fb0eb94b8230ec968c3389c1b7929fc2f3b # v2.68.13
+      - uses: taiki-e/install-action@d6e286fa45544157a02d45a43742857ebbc25d12 # v2.68.16
         with:
           tool: nextest@0.9
         if: ${{ matrix.test_task == 'zjit-check' }}