Bump Golang 1.13.15

full diff: https://github.com/golang/go/compare/go1.13.14...go1.13.15

go1.13.15 (released 2020/08/06) includes security fixes to the encoding/binary
package. See the Go 1.13.15 milestone on the issue tracker for details.

https://github.com/golang/go/issues?q=milestone%3AGo1.13.15+label%3ACherryPickApproved

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v1
         with:
-          go-version: '1.13.14'
+          go-version: '1.13.15'
 
       - name: Set env
         shell: bash
@@ -82,7 +82,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v1
         with:
-          go-version: '1.13.14'
+          go-version: '1.13.15'
 
       - name: Set env
         shell: bash
@@ -147,10 +147,10 @@ jobs:
     name: Build and CRI Test (Windows amd64)
     runs-on: windows-2016
     steps:
-      - name: Set up Go 1.13.14
+      - name: Set up Go 1.13.15
         uses: actions/setup-go@v1
         with:
-          go-version: 1.13.14
+          go-version: 1.13.15
 
       - name: Checkout cri repo
         uses: actions/checkout@v2