ci: use go install pkg@latest

Signed-off-by: Sebastien Binet <[email protected]>

Author: sbinet

.github/workflows/ci.yml

@@ -61,15 +61,11 @@ jobs:
     - name: Check copyrights+formatting
       run: |
           # Required for format check.
-          go get golang.org/x/tools/cmd/goimports
+          go install golang.org/x/tools/cmd/goimports@latest
           # Required for imports check.
-          go get gonum.org/v1/tools/cmd/check-imports
+          go install gonum.org/v1/tools/cmd/check-imports@latest
           # Required for copyright header check.
-          go get gonum.org/v1/tools/cmd/check-copyright
-
-          go install golang.org/x/tools/cmd/goimports
-          go install gonum.org/v1/tools/cmd/check-imports
-          go install gonum.org/v1/tools/cmd/check-copyright
+          go install gonum.org/v1/tools/cmd/check-copyright@latest
 
           ./.ci/check-copyright.sh
           ./.ci/check-formatting.sh