Revert ".github/workflows: lowercase github action names"

This reverts commit f12c1ee6e9e8cf53cd286916da35eb91ac672c45.

Reason for revert: This didn't fix the issue.

Change-Id: Ie42491925141d52d07e3dd5c516d5bff862b667e
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/411103
Reviewed-by: Suzy Mueller <suzmue@golang.org>
diff --git a/.github/workflows/release-nightly.yml b/.github/workflows/release-nightly.yml
index edcfac9..18af3bf 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 d77a83c..611f636 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 9be118d..aee3b90 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 f5b5cb8..1bfc8ed 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: