remove go1.20 from gh-actions test matrix

Removing go 1.20 from test matrix as we are moving to go 1.21.

Signed-off-by: Umanga Chapagain <[email protected]>

.github/workflows/ocs-operator-ci.yaml

@@ -25,7 +25,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        go: ["1.20", "1.21"]
+        go: ["1.21"]
     steps:
       - uses: actions/checkout@v3
         with:
@@ -46,7 +46,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        go: ["1.20", "1.21"]
+        go: ["1.21"]
     steps:
       - uses: actions/setup-go@v3
         with:
@@ -66,7 +66,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        go: ["1.20", "1.21"]
+        go: ["1.21"]
     steps:
       - uses: actions/setup-go@v3
         with: