add changelog for v0.5.1 (#675)

* add changelog for v0.5.1

Signed-off-by: cpanato <ctadeu@gmail.com>

* add url to point to the prs

Signed-off-by: cpanato <ctadeu@gmail.com>

CHANGELOG.md

@@ -1,3 +1,45 @@
+# v0.5.1
+
+## Enhancements
+
+* pipe all log messages to stdout for dev logger (https://github.com/sigstore/fulcio/pull/673)
+* Add CORS support to HTTP endpoint (https://github.com/sigstore/fulcio/pull/670)
+* generate OpenAPI documents from protobuf (https://github.com/sigstore/fulcio/pull/666)
+* Add Tink signing backend (https://github.com/sigstore/fulcio/pull/645)
+* Refactor in-memory signing CAs to use a single implementation (https://github.com/sigstore/fulcio/pull/644)
+* change grpc response logger to debug level instead of error (https://github.com/sigstore/fulcio/pull/648)
+* Add interface for certs/signer fetching to remove mutex (https://github.com/sigstore/fulcio/pull/643)
+
+## Miscellaneous
+
+* Bump github.com/googleapis/api-linter in /hack/tools (https://github.com/sigstore/fulcio/pull/674)
+* Update sigstore to pull in fixes (https://github.com/sigstore/fulcio/pull/671)
+* Bump github.com/spiffe/go-spiffe/v2 from 2.1.0 to 2.1.1 (https://github.com/sigstore/fulcio/pull/668)
+* Bump github.com/googleapis/api-linter in /hack/tools (https://github.com/sigstore/fulcio/pull/669)
+* add dependabot hack to monitor for new protoc releases (https://github.com/sigstore/fulcio/pull/667)
+* Bump github/codeql-action from 2.1.14 to 2.1.15 (https://github.com/sigstore/fulcio/pull/663)
+* Bump google.golang.org/api from 0.85.0 to 0.86.0 (https://github.com/sigstore/fulcio/pull/664)
+* Bump ossf/scorecard-action from 1.1.1 to 1.1.2 (https://github.com/sigstore/fulcio/pull/662)
+* Bump golang from `957001e` to `a452d62` (https://github.com/sigstore/fulcio/pull/661)
+* Bump golang from `1c3d22f` to `957001e` (https://github.com/sigstore/fulcio/pull/660)
+* Bump github/codeql-action from 2.1.13 to 2.1.14 (https://github.com/sigstore/fulcio/pull/659)
+* Bump github/codeql-action from 2.1.12 to 2.1.13 (https://github.com/sigstore/fulcio/pull/656)
+* Bump google.golang.org/api from 0.84.0 to 0.85.0 (https://github.com/sigstore/fulcio/pull/657)
+* Bump github.com/spf13/cobra from 1.4.0 to 1.5.0 (https://github.com/sigstore/fulcio/pull/658)
+* Bump github.com/prometheus/common from 0.34.0 to 0.35.0 (https://github.com/sigstore/fulcio/pull/655)
+* Bump github.com/googleapis/api-linter in /hack/tools (https://github.com/sigstore/fulcio/pull/653)
+* Bump actions/dependency-review-action from 2.0.1 to 2.0.2 (https://github.com/sigstore/fulcio/pull/652)
+* Bump golang from `b203dc5` to `1c3d22f` (https://github.com/sigstore/fulcio/pull/649)
+* Bump github.com/googleapis/api-linter in /hack/tools (https://github.com/sigstore/fulcio/pull/651)
+* Bump actions/dependency-review-action from 1.0.2 to 2.0.1 (https://github.com/sigstore/fulcio/pull/650)
+* Bump google.golang.org/api from 0.83.0 to 0.84.0 (https://github.com/sigstore/fulcio/pull/647)
+* Bump google.golang.org/api from 0.82.0 to 0.83.0 (https://github.com/sigstore/fulcio/pull/642)
+
+## Contributors
+
+* Bob Callaway (@bobcallaway)
+* Hayden Blauzvern (@haydentherapper)
+
 # v0.5.0
 
 ## Enhancements