increase gpu test timeout from 30min to 60min (#3071)

Summary:
Pull Request resolved: #3071

# context
* enable torchrec OSS GPU CI tests but find it frequently times out
* right now the timeout limit is 30 mins so increase it to 60 mins

Reviewed By: spmex

Differential Revision: D76291745

fbshipit-source-id: 9e0745715de615881e39e24de107ca71d815e21e

Author: TroyGarden

.github/workflows/unittest_ci.yml

@@ -69,7 +69,7 @@ jobs:
       contents: read
     with:
       runner: ${{ matrix.os }}
-      timeout: 30
+      timeout: 60
       script: |
         ldd --version
         conda create -y --name build_binary python=${{ matrix.python.version }}