Bump ramsey/composer-install from 2 to 3 (#575)

Bumps [ramsey/composer-install](https://github.com/ramsey/composer-install) from 2 to 3.
- [Release notes](https://github.com/ramsey/composer-install/releases)
- [Commits](ramsey/composer-install@v2...v3)

---
updated-dependencies:
- dependency-name: ramsey/composer-install
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/ci.yaml

@@ -26,7 +26,7 @@ jobs:
           php-version: "${{ matrix.php-version }}"
           ini-values: "${{ env.INI_VALUES }}"
           tools: composer-normalize,composer-require-checker,composer-unused
-      - uses: "ramsey/composer-install@v2"
+      - uses: "ramsey/composer-install@v3"
 
       - run: "composer validate --strict"
       - run: "composer-normalize --dry-run"
@@ -61,7 +61,7 @@ jobs:
           php-version: "${{ matrix.php-version }}"
           ini-values: "${{ env.INI_VALUES }}"
           extensions: "imap"
-      - uses: "ramsey/composer-install@v2"
+      - uses: "ramsey/composer-install@v3"
 
       - run: "sh .github/dovecot_install.sh"
 
@@ -98,7 +98,7 @@ jobs:
           coverage: "none"
           php-version: "${{ matrix.php-version }}"
           ini-values: "${{ env.INI_VALUES }}"
-      - uses: "ramsey/composer-install@v2"
+      - uses: "ramsey/composer-install@v3"
 
       - run: "vendor/bin/php-cs-fixer fix --verbose --dry-run --diff"
 
@@ -117,6 +117,6 @@ jobs:
           coverage: "none"
           php-version: "${{ matrix.php-version }}"
           ini-values: "${{ env.INI_VALUES }}"
-      - uses: "ramsey/composer-install@v2"
+      - uses: "ramsey/composer-install@v3"
 
       - run: "vendor/bin/phpstan analyse --no-progress --error-format=github"