.github/workflows: lowercase github action names

Change-Id: I90a87b2bd9aaaed3022803506a9c34d0140c034d
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/411099
Reviewed-by: Suzy Mueller <suzmue@golang.org>
diff --git a/.github/workflows/release-nightly.yml b/.github/workflows/release-nightly.yml
index 18af3bf..edcfac9 100644
--- a/.github/workflows/release-nightly.yml
+++ b/.github/workflows/release-nightly.yml
@@ -52,7 +52,7 @@
         run: npm run unit-test
 
       - name: Run tests
-        uses: GabrielBB/xvfb-action@86d97bde4a65fe9b290c0b3fb92c2c4ed0e5302d
+        uses: gabrielbb/xvfb-action@86d97bde4a65fe9b290c0b3fb92c2c4ed0e5302d
         with:
           run: npm run test
         env:
diff --git a/.github/workflows/test-long-all.yml b/.github/workflows/test-long-all.yml
index 611f636..d77a83c 100644
--- a/.github/workflows/test-long-all.yml
+++ b/.github/workflows/test-long-all.yml
@@ -52,7 +52,7 @@
         run: npm run unit-test
 
       - name: Run tests
-        uses: GabrielBB/xvfb-action@86d97bde4a65fe9b290c0b3fb92c2c4ed0e5302d
+        uses: gabrielbb/xvfb-action@86d97bde4a65fe9b290c0b3fb92c2c4ed0e5302d
         with:
           run: npm run test
         env:
diff --git a/.github/workflows/test-long.yml b/.github/workflows/test-long.yml
index aee3b90..9be118d 100644
--- a/.github/workflows/test-long.yml
+++ b/.github/workflows/test-long.yml
@@ -52,7 +52,7 @@
         run: npm run unit-test
         
       - name: Run tests
-        uses: GabrielBB/xvfb-action@86d97bde4a65fe9b290c0b3fb92c2c4ed0e5302d
+        uses: gabrielbb/xvfb-action@86d97bde4a65fe9b290c0b3fb92c2c4ed0e5302d
         with:
           run: npm run test
         env:
diff --git a/.github/workflows/test-smoke.yml b/.github/workflows/test-smoke.yml
index 1bfc8ed..f5b5cb8 100644
--- a/.github/workflows/test-smoke.yml
+++ b/.github/workflows/test-smoke.yml
@@ -49,7 +49,7 @@
         run: npm run unit-test
         
       - name: Run tests
-        uses: GabrielBB/xvfb-action@86d97bde4a65fe9b290c0b3fb92c2c4ed0e5302d
+        uses: gabrielbb/xvfb-action@86d97bde4a65fe9b290c0b3fb92c2c4ed0e5302d
         with:
           run: npm run test
         env: