Outdated Help%20Wanted labels corrected to Help-Wanted, properly show…

…ing filtered issues. Other outdated links corrected too.

CONTRIBUTING.md

@@ -101,7 +101,7 @@ If you don't have any additional info/context to add but would like to indicate
 
 If you're able & willing to help fix issues and/or implement features, we'd love your contribution!
 
-The best place to start is the list of ["good first issue"](https://github.com/microsoft/devhome/issues?q=is%3Aopen+is%3Aissue+label%3A%22Help+Wanted%22++label%3A%22good+first+issue%22+)s. These are bugs or tasks that we on the team believe would be easier to implement for someone without any prior experience in the codebase. Once you're feeling more comfortable in the codebase, feel free to just use the ["Help Wanted"](https://github.com/microsoft/devhome/issues?q=is%3Aopen+is%3Aissue+label%3A%22Help+Wanted%22+) label, or just find an issue you're interested in and hop in!
+The best place to start is the list of ["good first issue"](https://github.com/microsoft/devhome/issues?q=is%3Aopen+is%3Aissue+label%3A%22Help-Wanted%22++label%3A%22good-first-issue%22+)s. These are bugs or tasks that we on the team believe would be easier to implement for someone without any prior experience in the codebase. Once you're feeling more comfortable in the codebase, feel free to just use the ["Help Wanted"](https://github.com/microsoft/devhome/issues?q=is%3Aopen+is%3Aissue+label%3A%22Help-Wanted%22+) label, or just find an issue you're interested in and hop in!
 
 Generally, we categorize issues in the following way, which is largely derived from our old internal work tracking system:
 * ["Bugs"](https://github.com/microsoft/devhome/issues?q=is%3Aopen+is%3Aissue+label%3A%22Issue-Bug%22+) are parts of Dev Home that are not quite working the right way. There's code to already support some scenario, but it's not quite working right. Fixing these is generally a matter of debugging the broken functionality and fixing the wrong code.
@@ -146,7 +146,7 @@ Team members will be happy to help review specs and guide them to completion.
 
 ### Help wanted
 
-Once the team has approved an issue/spec, development can proceed. If no developers are immediately available, the spec can be parked ready for a developer to get started. Parked specs' issues will be labeled "Help Wanted". To find a list of development opportunities waiting for developer involvement, visit the Issues and filter on [the Help-Wanted label](https://github.com/microsoft/devhome/labels/Help%20Wanted).
+Once the team has approved an issue/spec, development can proceed. If no developers are immediately available, the spec can be parked ready for a developer to get started. Parked specs' issues will be labeled "Help Wanted". To find a list of development opportunities waiting for developer involvement, visit the Issues and filter on [the Help-Wanted label](https://github.com/microsoft/devhome/labels/Help-Wanted).
 
 ---
 
@@ -206,4 +206,4 @@ Once your code has been reviewed and approved by the requisite number of team me
 
 ## Thank you
 
-Thank you in advance for your contribution! Now, [what's next on the list](https://github.com/microsoft/devhome/labels/Help%20Wanted)? 😜
+Thank you in advance for your contribution! Now, [what's next on the list](https://github.com/microsoft/devhome/labels/Help-Wanted)? 😜