message: Clarify the keys we use when submitting rageshakes
  'pk' is a bit opaque in a context with both private keys and public keys
diff: @@ -93,15 +93,15 @@ async function collectBugReport(opts: IOpts = {}, gzipLogs = true) {
  body.append("cross_signing_supported_by_hs",
  String(await client.doesServerSupportUnstableFeature("org.matrix.e2e_cross_signing")));
  body.append("cross_signing_key", crossSigning.getId());
  - body.append("cross_signing_pk_in_secret_storage",
  + body.append("cross_signing_privkey_in_secret_storage",
  String(!!(await crossSigning.isStoredInSecretStorage(secretStorage))));
  const pkCache = client.getCrossSigningCacheCallbacks();
  - body.append("cross_signing_master_pk_cached",
  + body.append("cross_signing_master_privkey_cached",
  String(!!(pkCache && await pkCache.getCrossSigningKeyCache("master"))));
  - body.append("cross_signing_self_signing_pk_cached",
  + body.append("cross_signing_self_signing_privkey_cached",
  String(!!(pkCache && await pkCache.getCrossSigningKeyCache("self_signing"))));
  - body.append("cross_signing_user_signing_pk_cached",
  + body.append("cross_signing_user_signing_privkey_cached",
  String(!!(pkCache && await pkCache.getCrossSigningKeyCache("user_signing"))));
  body.append("secret_storage_ready", String(await client.isSecretStorageReady()));
  