internal: fix change detector

Change-Id: Iee891b4e61ecc53e0d7993e614dd7f4e0cd528de
Reviewed-on: https://code-review.googlesource.com/c/gocloud/+/50171
Reviewed-by: Tyler Bui-Palsulich <tbp@google.com>
diff --git a/internal/gapicgen/cmd/genbot/main.go b/internal/gapicgen/cmd/genbot/main.go
index 1b74f55..2e1733e 100644
--- a/internal/gapicgen/cmd/genbot/main.go
+++ b/internal/gapicgen/cmd/genbot/main.go
@@ -269,6 +269,7 @@
 	w := io.MultiWriter(os.Stderr, inmem)
 
 	c := exec.Command("bash", "-c", "git status --short")
+	c.Dir = dir
 	c.Stdout = w
 	c.Stderr = os.Stderr
 	c.Stdin = os.Stdin // Prevents "the input device is not a TTY" error.
diff --git a/internal/gapicgen/cmd/genlocal/README.md b/internal/gapicgen/cmd/genlocal/README.md
index a825a0f..733d1b1 100644
--- a/internal/gapicgen/cmd/genlocal/README.md
+++ b/internal/gapicgen/cmd/genlocal/README.md
@@ -19,7 +19,8 @@
         golang.org/x/lint/golint \
         golang.org/x/tools/cmd/goimports \
         honnef.co/go/tools/cmd/staticcheck \
-        golang.org/x/review/git-codereview
+        golang.org/x/review/git-codereview \
+        github.com/googleapis/gapic-generator-go/cmd/protoc-gen-go_gapic
     ```
 
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