chore: bump version to 7.11.0

internal/version.go and .release-please-manifest.json were stuck at
7.7.0 on GitLab (7.9.0 on GitHub -- the previous release's version
bump was apparently skipped). Bumping directly to 7.11.0 rather than
perpetuating the drift. Also updates the README install command's
pinned version.

Author: rotem-cloud

.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "7.7.0"
+  ".": "7.11.0"
 }

README.md

@@ -24,7 +24,7 @@ Or to pin the version:
 <!-- x-release-please-start-version -->
 
 ```sh
-go get -u 'github.com/cloudflare/cloudflare-go/v7@v7.9.0'
+go get -u 'github.com/cloudflare/cloudflare-go/v7@v7.11.0'
 ```
 
 <!-- x-release-please-end -->

internal/version.go

@@ -2,5 +2,5 @@
 
 package internal
 
-const PackageVersion = "7.7.0" // x-release-please-version
+const PackageVersion = "7.11.0" // x-release-please-version
 const APIVersion = ""