Update bazel docs to (more) accurately state allowed package names.
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MOS_MIGRATED_REVID=133257383
diff --git a/site/versions/master/docs/build-ref.html b/site/versions/master/docs/build-ref.html
index ac2aa7b..b90ac48 100644
--- a/site/versions/master/docs/build-ref.html
+++ b/site/versions/master/docs/build-ref.html
@@ -435,13 +435,12 @@
BUILD file, relative to the top-level directory of the source tree.
For example: <code>my/app</code>.
- Package names must start with a lower-case ASCII letter
- (<code>a</code>–<code>z</code>),
- and must be composed entirely of characters drawn from the set
- <code>a</code>–<code>z</code>, <code>0</code>–<code>9</code>,
- '<code>_</code>', and '<code>/</code>'.
-</p>
+ Package names must be composed entirely of characters drawn from
+ the set <code>A</code>-<code>Z</code>, <code>a</code>–<code>z</code>,
+ <code>0</code>–<code>9</code>, '<code>/</code>', '<code>-</code>',
+ '<code>.</code>', and '<code>_</code>', and cannot start with
+ a slash.
<p>
For a language with a directory structure that is significant
to its module system (e.g. Java), it is important to choose directory names
