Update go version in PR GitHub actions workflow to 1.16

Signed-off-by: Angel Misevski <[email protected]>

Author: amisevsk

.github/workflows/pr.yml

@@ -15,7 +15,7 @@ jobs:
       name: Set up Go 1.x
       uses: actions/setup-go@v2
       with:
-        go-version: 1.13
+        go-version: 1.16
     -
       name: Set up Python 3.8
       uses: actions/setup-python@v2