refactor: move to go 1.21 (#35)

Author: AustinAbro321

.github/actions/install-tools/action.yaml

@@ -15,7 +15,7 @@ runs:
 
     - uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
       with:
-        go-version: 1.22.x
+        go-version: 1.21.x
         cache-dependency-path: |
           **/go.sum
           **/go.mod

helpers/go.mod

@@ -1,6 +1,6 @@
 module github.com/defenseunicorns/pkg/helpers
 
-go 1.22.0
+go 1.21.8
 
 require (
 	github.com/otiai10/copy v1.14.0