fix(github): silence contents endpoint deprecation warnings

Use RFC 6570 reserved expansion ({+path}) so slashes stay literal in
the request URL, and pin the contents call to API version 2026-03-10
to clear the Sunset: 2028-03-10 header on the deprecated 2022-11-28
version. The only breaking change in 2026-03-10 (submodule type in
directory listings) doesn't affect us — fetchLatestSha is per-file
and the array branch already short-circuits.

src/hooks/useGitHubContent.hook.ts

@@ -15,12 +15,12 @@ export const useGitHubContent = ({
     try {
       const octokit = await getOctokit()
       const response = await octokit.request(
-        "GET /repos/{owner}/{repo}/contents/{path}",
+        "GET /repos/{owner}/{repo}/contents/{+path}",
         {
           owner: user,
           repo,
           path,
-          headers: { "X-GitHub-Api-Version": "2022-11-28" }
+          headers: { "X-GitHub-Api-Version": "2026-03-10" }
         }
       )
       const data = response?.data
@@ -44,7 +44,7 @@ export const useGitHubContent = ({
       const octokit = await getOctokit()
 
       const response = await octokit.request(
-        `PUT /repos/{owner}/{repo}/contents/{path}`,
+        "PUT /repos/{owner}/{repo}/contents/{+path}",
         {
           owner: user,
           repo,