github/workflows: update go versions

1.17 is the latest stable go version.

Change-Id: I3a522a7ef992e85102c5ed423b245f4e8220279e
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/350138
Trust: Hyang-Ah Hana Kim <[email protected]>
Run-TryBot: Hyang-Ah Hana Kim <[email protected]>
TryBot-Result: kokoro <[email protected]>
Reviewed-by: Suzy Mueller <[email protected]>

Author: hyangah

.github/workflows/release-nightly.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v2
         with:
-         go-version: '1.16'
+         go-version: '1.17'
 
       - name: Install dependencies
         run: npm ci

.github/workflows/test-long-all.yml

@@ -17,7 +17,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
         version: ['stable', 'insiders']
-        go: ['1.15', '1.16', '1.17.0-rc1']
+        go: ['1.15', '1.16', '1.17']
 
     steps:
       - name: Clone repository

.github/workflows/test-long.yml

@@ -16,7 +16,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest] # TODO: reenable macos-latest
         version: ['stable']
-        go: ['1.15', '1.16', '1.17.0-rc1']
+        go: ['1.15', '1.16', '1.17']
 
     steps:
       - name: Clone repository

.github/workflows/test-smoke.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v2
         with:
-         go-version: '1.16'
+         go-version: '1.17'
 
       - name: Install dependencies
         run: npm ci