tests: bumped the NGINX core to 1.29.2.

Author: zhuizhuhaomeng

.travis.yml

@@ -43,7 +43,7 @@ env:
     - NGX_BUILD_JOBS=$JOBS
     - TEST_NGINX_SLEEP=0.006
   matrix:
-    - NGINX_VERSION=1.27.1 NGX_EXTRA_OPT=--without-pcre2
+    - NGINX_VERSION=1.29.2 NGX_EXTRA_OPT=--without-pcre2
 
 services:
  - mysql