chore(all): update module github.com/google/go-github/v33 to v34 (#3867)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [github.com/google/go-github/v33](https://togithub.com/google/go-github) | require | major | `v33.0.0` -> `v34.0.0` |

---

### Release Notes

<details>
<summary>google/go-github</summary>

### [`v34.0.0`](https://togithub.com/google/go-github/releases/v34.0.0)

[Compare Source](https://togithub.com/google/go-github/compare/v33.0.0...v34.0.0)

This release contains the following breaking API change:

-   [#&#8203;1794](https://togithub.com/google/go-github/issues/1794)

Thank you to all the volunteers who help keep this repo up-to-date!

</details>

---

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internal/gapicgen/cmd/genbot/github.go

@@ -29,7 +29,7 @@ import (
 	"time"
 
 	"cloud.google.com/go/internal/gapicgen/generator"
-	"github.com/google/go-github/v33/github"
+	"github.com/google/go-github/v34/github"
 	"github.com/shurcooL/githubv4"
 	"golang.org/x/oauth2"
 )

internal/gapicgen/go.mod

@@ -4,7 +4,7 @@ go 1.13
 
 require (
 	github.com/golang/protobuf v1.5.1 // indirect
-	github.com/google/go-github/v33 v33.0.0
+	github.com/google/go-github/v34 v34.0.0
 	github.com/kr/text v0.2.0 // indirect
 	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
 	github.com/shurcooL/githubv4 v0.0.0-20201206200315-234843c633fa

internal/gapicgen/go.sum

@@ -102,8 +102,8 @@ github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.5.1/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-github/v33 v33.0.0 h1:qAf9yP0qc54ufQxzwv+u9H0tiVOnPJxo0lI/JXqw3ZM=
-github.com/google/go-github/v33 v33.0.0/go.mod h1:GMdDnVZY/2TsWgp/lkYnpSAh6TrzhANBBwm6k6TTEXg=
+github.com/google/go-github/v34 v34.0.0 h1:/siYFImY8KwGc5QD1gaPf+f8QX6tLwxNIco2RkYxoFA=
+github.com/google/go-github/v34 v34.0.0/go.mod h1:w/2qlrXUfty+lbyO6tatnzIw97v1CM+/jZcwXMDiPQQ=
 github.com/google/go-querystring v1.0.0 h1:Xkwi/a1rcvNg1PPYe5vI8GbeBY/jrVuDX5ASuANWTrk=
 github.com/google/go-querystring v1.0.0/go.mod h1:odCYkC5MyYFN7vkCjXpyrEuKhc/BUO6wN/zVPAxq5ck=
 github.com/google/martian v2.1.0+incompatible/go.mod h1:9I4somxYTbIHy5NJKHRl3wXiIaQGbYVAs8BPL6v8lEs=