Replace enabling Corepack with installing it explicitly

Author: wojtekmaj

.github/workflows/ci.yml

@@ -47,8 +47,8 @@ jobs:
         with:
           node-version: '22'
 
-      - name: Enable Corepack
-        run: corepack enable
+      - name: Install Corepack
+        run: npm install -g corepack
 
       - name: Install dependencies
         run: yarn --immutable

.github/workflows/publish.yml

@@ -35,8 +35,8 @@ jobs:
           node-version: '22'
           registry-url: 'https://registry.npmjs.org'
 
-      - name: Enable Corepack
-        run: corepack enable
+      - name: Install Corepack
+        run: npm install -g corepack
 
       - name: Install dependencies
         run: yarn --immutable