chore: update protobuf and gapic-generator-csharp versions. (#25)

PiperOrigin-RevId: 320411362

Source-Author: Google APIs <noreply@google.com>
Source-Date: Thu Jul 9 09:26:49 2020 -0700
Source-Repo: googleapis/googleapis
Source-Sha: db69b46790b55a82ab7cfa473d031da787bc7591
Source-Link: googleapis/googleapis@db69b46

Author: yoshi-automation

google/cloud/devtools/containeranalysis_v1/proto/containeranalysis_pb2.py

@@ -4,15 +4,15 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/python-containeranalysis.git",
-        "sha": "be290885cef76ffdd27afb44cd858c6a89d4f280"
+        "sha": "ddf95852778c0e60961516ecd77b793e6af3295b"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "b882b8e6bfcd708042ff00f7adc67ce750817dd0",
-        "internalRef": "318028816"
+        "sha": "db69b46790b55a82ab7cfa473d031da787bc7591",
+        "internalRef": "320411362"
       }
     },
     {