adjust issue templates for Codeberg

.forgejo/ISSUE_TEMPLATE/bug.yml

@@ -1,6 +1,6 @@
 name: Bug Report
 description: File a bug report
-labels: ["bug"]
+labels: ["kind/bug"]
 body:
   - type: markdown
     attributes:

.forgejo/ISSUE_TEMPLATE/config.yml

@@ -7,7 +7,7 @@ contact_links:
     url: https://ziglang.org/community
   - name: C Translation
     about: "Issues related to `zig translate-c` and `@cImport` are tracked separately."
-    url: https://github.com/ziglang/translate-c/
+    url: https://codeberg.org/ziglang/translate-c
   - name: Copilot and Other LLMs
     about: "Please do not use GitHub Copilot or any other LLM to write an issue."
     url: https://ziglang.org/code-of-conduct

.forgejo/ISSUE_TEMPLATE/error_message.yml

@@ -1,6 +1,6 @@
 name: Error message improvement
 description: Compiler produces an unhelpful or misleading error message.
-labels: ["error message"]
+labels: ["kind/error message"]
 body:
   - type: input
     id: version