Fix typo in github test workflow

Author: andersevenrud

.github/workflows/test.yml

@@ -12,6 +12,6 @@ jobs:
     - uses: actions/setup-node@v1
       with:
         node-version: ${{ matrix.node }}
-    - run: npm install -g jest^26
+    - run: npm install -g jest@^26
     - run: npm install
     - run: npm run jest