ci: add depguard for gopkg.in/yaml.v2 (#1246)

Signed-off-by: Stephan Renatus <[email protected]>

.golangci.yaml

@@ -24,7 +24,6 @@ linters:
     - ireturn
     - funlen
     - nolintlint
-    - depguard
     - gomoddirectives # need replacements for wasip1
     - execinquery # deprecated
     - exportloopref # deprecated
@@ -58,6 +57,13 @@ linters-settings:
       - blank
       - dot
 
+  depguard:
+    rules:
+      main:
+        deny:
+          - pkg: "gopkg.in/yaml.v2"
+            desc: use yaml.v3 only
+
 issues:
   exclude-dirs:
     - internal/lsp/opa