ci: update go version to 1.19

Problem: the container builds are using an old Go, 1.19
Solution: update to 1.21 to match the rest of CI recipes.
Signed-off-by: vsoch <vsoch@users.noreply.github.com>

.github/workflows/build-deploy.yaml

@@ -20,7 +20,7 @@ jobs:
     - uses: actions/checkout@v4
     - uses: actions/setup-go@v4
       with:
-        go-version: ^1.19
+        go-version: ^1.21
 
     - name: Build Containers
       run: |
@@ -57,7 +57,7 @@ jobs:
     - uses: actions/checkout@v4
     - uses: actions/setup-go@v4
       with:
-        go-version: ^1.19
+        go-version: ^1.21
 
     - name: Build Containers
       run: |
@@ -94,7 +94,7 @@ jobs:
     - uses: actions/checkout@v4
     - uses: actions/setup-go@v4
       with:
-        go-version: ^1.19
+        go-version: ^1.21
 
     - name: Build Container
       run: |