chore: update pull request template (#549)

Author: yoshi-automation

handwritten/bigtable/.github/PULL_REQUEST_TEMPLATE.md

@@ -1,5 +1,5 @@
 Thank you for opening a Pull Request! Before submitting your PR, there are a few things you can do to make sure it goes smoothly:
-- [ ] Make sure to open an issue as a [bug/issue](https://github.com/googleapis/{{metadata['repo']['name']}}/issues) before writing your code!  That way we can discuss the change, evaluate designs, and agree on the general idea
+- [ ] Make sure to open an issue as a [bug/issue](https://github.com/googleapis/nodejs-bigtable/issues/new/choose) before writing your code!  That way we can discuss the change, evaluate designs, and agree on the general idea
 - [ ] Ensure the tests and linter pass
 - [ ] Code coverage does not decrease (if any source code was changed)
 - [ ] Appropriate docs were updated (if necessary)

handwritten/bigtable/synth.metadata

@@ -1,5 +1,5 @@
 {
-  "updateTime": "2019-09-27T11:10:46.193775Z",
+  "updateTime": "2019-10-01T11:11:44.720863Z",
   "sources": [
     {
       "generator": {
@@ -12,8 +12,8 @@
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "cd112d8d255e0099df053643d4bd12c228ef7b1b",
-        "internalRef": "271468707"
+        "sha": "ce3c574d1266026cebea3a893247790bd68191c2",
+        "internalRef": "272147209"
       }
     },
     {