ci: drop obsolete 'pnpm config set auto-install-peers false' (rejected by pnpm 11)

Author: JohnMcLear

.github/workflows/backend-tests.yml

@@ -53,7 +53,6 @@ jobs:
       -
         name: Prepare plugin
         run: |
-          pnpm config set auto-install-peers false
           cd ./plugin
           PLUGIN_NAME=$(npx -c 'printf %s\\n "${npm_package_name}"') || exit 1
           echo "PLUGIN_NAME=$PLUGIN_NAME" >> $GITHUB_ENV

.github/workflows/npmpublish.yml

@@ -45,9 +45,7 @@ jobs:
       -
         run: cd ../etherpad-lite && ./bin/installDeps.sh && pnpm link --global .
       -
-        run: |
-          pnpm config set auto-install-peers false
-          pnpm i
+        run: pnpm i
       -
         run: |
           has_testcli_script () {
@@ -89,8 +87,6 @@ jobs:
           node-version: 24
           cache: pnpm
           registry-url: https://registry.npmjs.org/
-      - name: Only install direct dependencies
-        run: pnpm config set auto-install-peers false
       -
         name: Bump version (patch)
         run: |