Update issue-labeler and fix the regex (#4512)

* Fix regex in issue labeler config

The regex was wrongly matching extra characters through the use of `.` which matches any character. This also adds the requirement of the match version number being immediately after the `Minecraft Version` section.

* update issue-labeler to v3

* Update labels.yml

* fix backslashes again

* fix that there are actually two newlines

* fix escaping again?

* use sync labels

* use single quotes

* use more double backslashes

* reduce to test if this works at all

* reintroduce minecraft version

* doesn't work

* try previous version

* didn't help

* add back the 1.

.github/config/labels.yml

@@ -1,12 +1,12 @@
 1.14:
-    - "1.14"
+    - '1\.14(?:\.\d)?'
 1.15:
-    - "1.15"
+    - '1\.15(?:\.\d)?'
 1.16:
-    - "1.16"
+    - '1\.16(?:\.\d)?'
 1.17:
-    - "1.17"
+    - '1\.17(?:\.\d)?'
 1.18:
-    - "1.18"
+    - '1\.18(?:\.\d)?'
 1.19:
-    - "1.19"
+    - '1\.19(?:\.\d)?'

.github/workflows/label_issues.yml

@@ -7,8 +7,9 @@ jobs:
     label:
         runs-on: ubuntu-latest
         steps:
-            - uses: github/issue-labeler@v2.0
+            - uses: github/issue-labeler@v3.0
               with:
                   configuration-path: .github/config/labels.yml
                   enable-versioned-regex: 0
                   repo-token: ${{ secrets.GITHUB_TOKEN }}
+                  sync-labels: 1