Update tests.yml

Author: beckermr

.github/workflows/tests.yml

@@ -99,7 +99,8 @@ jobs:
       - name: install bzip2 and curl on linux
         if: matrix.os == 'ubuntu-latest'
         run: |
-          sudo apt-get install libbz2-dev curl   libcurl4-openssl-dev
+          sudo apt-get update
+          sudo apt-get install libbz2-dev curl  libcurl4-openssl-dev
 
       - name: test install sdist .gz with no unit tests
         run: |