rx300: fix sha1sum for gitea

From Discord:
> INFO: v1.15.9 release build checksums will change
> Reason: there where two builds: the first tag did not build docker images (unrelated issue) and we had to restart it, the second time it did run successfully but reupload of artifacts to github failed this time :/
> So there was a missmatch with checksum of artifacts from dl.gitea.io & github
> -> we just restarted the pipeline to resolve that again

nodes/rx300.py

@@ -130,7 +130,7 @@ nodes['rx300'] = {
         },
         'gitea': {
             'version': '1.15.9',
-            'sha1': '35a1a24e942be1d54c076fec495680cda4e69e65',
+            'sha1': '7475adf03bb757073d4cd6d403bbe25f9ff113b7',
             'domain': 'git.franzi.business',
             'email_domain_blocklist': {
                 'gmail.com',