[action] pin to 1.15.8 not ^1.15.8

- was bumping all the way to 1.16

.github/workflows/release.yml

@@ -20,7 +20,7 @@ jobs:
         name: Setup Go
         uses: actions/setup-go@v2
         with:
-          go-version: '^1.15.8'
+          go-version: '1.15.8'
       -
         name: Install Deps
         id: install-deps
@@ -105,7 +105,7 @@ jobs:
         name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: '^1.15.8'
+          go-version: '1.15.8'
       -
         name: APT Install
         id: aptInstall
@@ -135,7 +135,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v2
         with:
-          go-version: '^1.15.8'
+          go-version: '1.15.8'
       - name: Build
         id: build
         run: |

.github/workflows/test.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v2
         with:
-          go-version: '^1.15.6'
+          go-version: '1.15.6'
       - name: Install Deps
         id: install-deps
         run: sudo apt-get -y install libpcsclite-dev