.github/workflows: change tabs to spaces

Change-Id: Id5cb1a5f339e22c85f0282ce625773d2dff8ab16
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/317293
Trust: Suzy Mueller <[email protected]>
Run-TryBot: Suzy Mueller <[email protected]>
TryBot-Result: kokoro <[email protected]>
Reviewed-by: Hyang-Ah Hana Kim <[email protected]>

Author: suzmue

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

@@ -61,7 +61,7 @@ jobs:
             go get github.com/ramya-rao-a/go-outline
             go get github.com/go-delve/delve/cmd/dlv@master
             cp "${HOME}/go/bin/dlv${{env.EXT}}" "${HOME}/go/bin/dlv-dap${{env.EXT}}"
-			go get github.com/go-delve/delve/cmd/dlv
+            go get github.com/go-delve/delve/cmd/dlv
         env:
           GO111MODULE: on
           EXT: "${{ matrix.os == 'windows-latest' && '.exe' || ''}}"

.github/workflows/test-long.yml

@@ -60,7 +60,7 @@ jobs:
             go get github.com/ramya-rao-a/go-outline
             go get github.com/go-delve/delve/cmd/dlv@master
             cp "${HOME}/go/bin/dlv${{env.EXT}}" "${HOME}/go/bin/dlv-dap${{env.EXT}}"
-			go get github.com/go-delve/delve/cmd/dlv
+            go get github.com/go-delve/delve/cmd/dlv
         env:
           GO111MODULE: on
           EXT: "${{ matrix.os == 'windows-latest' && '.exe' || ''}}"

.github/workflows/test-smoke.yml

@@ -58,7 +58,7 @@ jobs:
             go get github.com/ramya-rao-a/go-outline
             go get github.com/go-delve/delve/cmd/dlv@master
             cp "${HOME}/go/bin/dlv${{env.EXT}}"  "${HOME}/go/bin/dlv-dap${{env.EXT}}"
-			go get github.com/go-delve/delve/cmd/dlv
+            go get github.com/go-delve/delve/cmd/dlv
         env:
           GO111MODULE: on
           EXT: "${{ matrix.os == 'windows-latest' && '.exe' || ''}}"