Pin stdeb dependency for dist env

Change-Id: Ib5b40598d8d13e5f91f420afa56fdfba370e19c3
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/requirements-dist.in b/requirements-dist.in
index 28d0ce1..daa2838 100644
--- a/requirements-dist.in
+++ b/requirements-dist.in
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-stdeb
+stdeb==0.10.2
 setuptools-version-command
 setuptools<60
 pyang