Adding .bazelversion file

PiperOrigin-RevId: 704783794
Change-Id: Iadcc2ca4d959723feb946080b4bba97dcff701b5
diff --git a/.bazelversion b/.bazelversion
new file mode 100644
index 0000000..a8a1887
--- /dev/null
+++ b/.bazelversion
@@ -0,0 +1 @@
+7.1.2