Update issue templates to use consistent "new contribution" label (without the dash) for consistency

Author: SableRaf

.github/ISSUE_TEMPLATE/1_new-library.yml

@@ -1,6 +1,6 @@
 name: 💙 New Library
 description: Submit a new Processing library
-labels: ["new-contribution", "library"]
+labels: ["new contribution", "library"]
 body:
   - type: markdown
     attributes:

.github/ISSUE_TEMPLATE/2_new-tool.yml

@@ -1,6 +1,6 @@
 name: 🔨 New Tool
 description: Submit a new Processing tool
-labels: ["new-contribution", "tool"]
+labels: ["new contribution", "tool"]
 body:
   - type: markdown
     attributes:

.github/ISSUE_TEMPLATE/3_new-mode.yml

@@ -1,6 +1,6 @@
 name: 👗 New Mode
 description: Submit a new Processing mode
-labels: ["new-contribution", "mode"]
+labels: ["new contribution", "mode"]
 body:
   - type: markdown
     attributes:

.github/ISSUE_TEMPLATE/4_new-examples.yml

@@ -1,6 +1,6 @@
 name: 📦 New Example Pack
 description: Submit a new Processing example pack
-labels: ["new-contribution", "examples"]
+labels: ["new contribution", "examples"]
 body:
   - type: markdown
     attributes:

.github/workflows/issue_to_pr.yml

@@ -5,7 +5,7 @@ on:
       - opened
       - edited
       - reopened
-    if: contains(github.event.issue.labels.*.name, 'new-contribution')
+    if: contains(github.event.issue.labels.*.name, 'new contribution')
 permissions:
   contents: write
   issues: write