Fix GitHub label color values

Update the configuration for repository labels to remove the leading
`#` from color values. With a `#` leading the values they are seen as
invalid by the GitHub API.

.github/labels.yml

@@ -2,66 +2,66 @@
 # Rather than breaking up descriptions into multiline strings we disable that
 # specific rule in yamllint for this file.
 # yamllint disable rule:line-length
-- color: "#eb6420"
+- color: "eb6420"
   description: This issue or pull request is awaiting the outcome of another issue or pull request
   name: blocked
-- color: "#000000"
+- color: "000000"
   description: This issue or pull request involves changes to existing functionality
   name: breaking change
-- color: "#d73a4a"
+- color: "d73a4a"
   description: This issue or pull request addresses broken functionality
   name: bug
-- color: "#07648d"
+- color: "07648d"
   description: This issue will be advertised on code.gov's Open Tasks page (https://code.gov/open-tasks)
   name: code.gov
-- color: "#0366d6"
+- color: "0366d6"
   description: Pull requests that update a dependency file
   name: dependencies
-- color: "#5319e7"
+- color: "5319e7"
   description: This issue or pull request improves or adds to documentation
   name: documentation
-- color: "#cfd3d7"
+- color: "cfd3d7"
   description: This issue or pull request already exists or is covered in another issue or pull request
   name: duplicate
-- color: "#b005bc"
+- color: "b005bc"
   description: A high-level objective issue encompassing multiple issues instead of a specific unit of work
   name: epic
-- color: "#000000"
+- color: "000000"
   description: Pull requests that update GitHub Actions code
   name: github-actions
-- color: "#0e8a16"
+- color: "0e8a16"
   description: This issue or pull request is well-defined and good for newcomers
   name: good first issue
-- color: "#ff7518"
+- color: "ff7518"
   description: Pull request that should count toward Hacktoberfest participation
   name: hacktoberfest-accepted
-- color: "#a2eeef"
+- color: "a2eeef"
   description: This issue or pull request will add or improve functionality, maintainability, or ease of use
   name: improvement
-- color: "#fef2c0"
+- color: "fef2c0"
   description: This issue or pull request is not applicable, incorrect, or obsolete
   name: invalid
-- color: "#ce099a"
+- color: "ce099a"
   description: This pull request is ready to merge during the next Lineage Kraken release
   name: kraken 🐙
-- color: "#a4fc5d"
+- color: "a4fc5d"
   description: This issue or pull request requires further information
   name: need info
-- color: "#fcdb45"
+- color: "fcdb45"
   description: This pull request is awaiting an action or decision to move forward
   name: on hold
-- color: "#ef476c"
+- color: "ef476c"
   description: This issue is a request for information or needs discussion
   name: question
-- color: "#00008b"
+- color: "00008b"
   description: This issue or pull request adds or otherwise modifies test code
   name: test
-- color: "#1d76db"
+- color: "1d76db"
   description: This issue or pull request pulls in upstream updates
   name: upstream update
-- color: "#d4c5f9"
+- color: "d4c5f9"
   description: This issue or pull request increments the version number
   name: version bump
-- color: "#ffffff"
+- color: "ffffff"
   description: This issue will not be incorporated
   name: wontfix