ci(root): run release gate on node 22

Align the pre-publish shrinkwrap installation check with the package engine floor so engine-strict validates dependencies instead of rejecting bitgo itself.

TICKET: WCN-2596

Author: zahin-mohammad

.github/workflows/npmjs-release.yml

@@ -309,7 +309,7 @@ jobs:
 
       # WCN-2091: fail the release BEFORE bitgo publishes if the shrinkwrap it
       # would ship pins any transitive that violates our declared engines (Node
-      # >=20). Runs after pass 1 because the shrinkwrap generator resolves
+      # >=22). Runs after pass 1 because the shrinkwrap generator resolves
       # newly-published siblings from the registry. Pack + install here, not
       # --package-lock-only, so `engine-strict=true` actually validates every
       # frozen entry's engines. If this fails, siblings are already on npm but
@@ -325,13 +325,13 @@ jobs:
           echo "PREPUB_TARBALL=$tarball" >> "$GITHUB_ENV"
           echo "Packed: $tarball"
 
-      - name: Pre-publish shrinkwrap check — setup Node 20
+      - name: Pre-publish shrinkwrap check — setup Node 22
         if: inputs.dry-run == false
         uses: actions/setup-node@v6
         with:
-          node-version: '20.x'
+          node-version: '22.x'
 
-      - name: Pre-publish shrinkwrap check — install tarball on Node 20 with engine-strict
+      - name: Pre-publish shrinkwrap check — install tarball on Node 22 with engine-strict
         if: inputs.dry-run == false
         run: |
           workdir="$(mktemp -d)"
@@ -340,7 +340,7 @@ jobs:
           npm init -y >/dev/null
           echo "Verifying $PREPUB_TARBALL installs on $(node --version) with engine-strict=true"
           if ! npm install "$PREPUB_TARBALL" --no-audit --no-fund --ignore-scripts 2>install.log; then
-            echo "::error::Pre-publish shrinkwrap check FAILED — bitgo tarball cannot be installed on Node 20 with engine-strict. Fix before publishing."
+            echo "::error::Pre-publish shrinkwrap check FAILED — bitgo tarball cannot be installed on Node 22 with engine-strict. Fix before publishing."
             cat install.log
             exit 1
           fi