Revert Basic to basic as the word checked by gitea api is basic

Signed-off-by: cmoulliard <cmoulliard@redhat.com>

packages/integration/src/gitea/core.test.ts

@@ -118,7 +118,7 @@ describe('gitea core', () => {
         password: 'P',
       };
 
-      const basicAuthentication = `Basic ${Buffer.from(
+      const basicAuthentication = `basic ${Buffer.from(
         `${authRequest.username}:${authRequest.password}`,
       ).toString('base64')}`;
 

packages/integration/src/gitea/core.ts

@@ -120,7 +120,7 @@ export function getGiteaRequestOptions(config: GiteaIntegrationConfig): {
   }
 
   if (username) {
-    headers.Authorization = `Basic ${Buffer.from(
+    headers.Authorization = `basic ${Buffer.from(
       `${username}:${password}`,
     ).toString('base64')}`;
   } else {