ci(release): bump go version for relase and modular-docs

Author: rkpattnaik780

.github/workflows/modular-docs-publish.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.16.x
+          go-version: 1.18.x
       - run: make generate-downstream-docs
         name: Generate generate-downstream-docs
       - name: Deploy

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
         name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.16.x
+          go-version: 1.18.x
 
       - name: Check tag
         id: check-tag