ci: Update Yarn workflows to use corepack

Author: nellh

.github/workflows/eslint.yml

@@ -14,6 +14,6 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v5
         with:
-          node-version: "20.x"
-      - run: yarn install
-      - run: yarn run lint
+          node-version: "22.x"
+      - run: corepack enable && corepack prepare yarn@4.10.3 --activate
+      - run: yarn install --immutable

.github/workflows/typescript.yml

@@ -17,7 +17,8 @@ jobs:
         with:
           node-version: ${{ matrix.node-version }}
           cache: "yarn"
-      - run: yarn install
+      - run: corepack enable && corepack prepare [email protected] --activate
+      - run: yarn install --immutable
       - run: yarn test --coverage
       - name: Upload coverage reports to Codecov with GitHub Action
         uses: codecov/codecov-action@v5