Update github workflow to Go 1.16 (redhat-best-practices-for-k8s#28)

Author: sebrandon1

.github/workflows/merge.yml

@@ -12,10 +12,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-      - name: Set up Go 1.15
+      - name: Set up Go 1.16
         uses: actions/setup-go@v2
         with:
-          go-version: ^1.15
+          go-version: ^1.16
 
       - name: Check out code into the Go module directory
         uses: actions/checkout@v2

.github/workflows/pre-main.yml

@@ -14,10 +14,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-      - name: Set up Go 1.15
+      - name: Set up Go 1.16
         uses: actions/setup-go@v2
         with:
-          go-version: ^1.15
+          go-version: ^1.16
 
       - name: Check out code into the Go module directory
         uses: actions/checkout@v2