fix typo in rock-update workflow (#133)

* fix rock-update to use major-minor go version

* fix typo

.github/workflows/rock-update.yaml

@@ -102,7 +102,7 @@ jobs:
           # Delete the Go dependency and add the updated one
           yq -i 'del(.parts.${{ inputs.rock-name }}.build-snaps.[] | select(. == "go/*"))' $GITHUB_WORKSPACE/main/$version/rockcraft.yaml
           # Snap channels are named after major.minor only, so cut the go version to that format
-          go_major_minor=$(echo $go_version | sed -E "s/([0-9]+\.[0-9]+).*/\1/"))
+          go_major_minor=$(echo $go_version | sed -E "s/([0-9]+\.[0-9]+).*/\1/")
           go_v="$go_major_minor" yq -i '.parts.${{ inputs.rock-name }}.build-snaps += "go/"+strenv(go_v)+"/stable"' $GITHUB_WORKSPACE/main/$version/rockcraft.yaml
 
       - name: Update other build dependencies