Merge 0a4a737175 into 9c550dd5a1

Bumps [tj-actions/changed-files](https://github.com/tj-actions/changed-files) from 45.0.4 to 45.0.5.
- [Release notes](https://github.com/tj-actions/changed-files/releases)
- [Changelog](https://github.com/tj-actions/changed-files/blob/main/HISTORY.md)
- [Commits](https://github.com/tj-actions/changed-files/compare/v45.0.4...v45.0.5)

---
updated-dependencies:
- dependency-name: tj-actions/changed-files
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/check-urls.yml

@@ -42,7 +42,7 @@ jobs:
           fetch-depth: ${{ steps.set-params.outputs.fetch-depth }}
       - name: Get changed files
         id: changed-files
-        uses: tj-actions/changed-files@v45.0.4
+        uses: tj-actions/changed-files@v45.0.5
         with:
           separator: " "
           json: true

books/free-programming-books-subjects.md

@@ -161,10 +161,10 @@ Books that cover a specific programming language can be found in the [BY PROGRAM
 * [Build a Blockchain from Scratch in Go with gRPC](https://github.com/volodymyrprokopyuk/go-blockchain) - Volodymyr Prokopyuk
 * [chain.courses](https://web.archive.org/web/20220127020549/https://chain.courses/) - James Gan, Rishub Kumar *(:card_file_box: archived)*
 * [Getting Started with Enterprise Blockchain: A Guide to Design and Development](https://www.ibm.com/downloads/cas/RYWXAR0M) - Michael Bradley, David Gorman, Matt Lucas, Matthew Golby-Kirk (PDF)
-* [Grokking Bitcoin](https://rosenbaum.se/book/) - Kalle Rosenbaum (HTML)
+* [Grokking Bitcoin](https://rosenbaum.se/book/) - Kalle Rosenbaum (HTML) `(CC BY-NC-SA)`
 * [IBM Blockchain: The Founder’s Handbook, Third Edition](https://www.ibm.com/downloads/cas/GZPPMWM5) - Antonio Banda, Matthew Hamilton, Eileen Lowry, John Widdifield, et al. (PDF)
 * [Learning Bitcoin from the Command Line](https://github.com/BlockchainCommons/Learning-Bitcoin-from-the-Command-Line) - Christopher Allen, Shannon Appelcline, et al. (HTML)
-* [Mastering Bitcoin - Unlocking digital currencies (2017), 2nd Edition](https://github.com/bitcoinbook/bitcoinbook) - Andreas M. Antonopoulos (AsciiDoc)
+* [Mastering Bitcoin - Unlocking digital currencies (2017), 2nd Edition](https://github.com/bitcoinbook/bitcoinbook) - Andreas M. Antonopoulos (AsciiDoc) `(CC BY-NC-ND)`
 * [Mastering Ethereum (2018), 1st Edition](https://github.com/ethereumbook/ethereumbook) - Andreas M. Antonopoulos, Gavin Wood (AsciiDoc) 
 * [Mastering the Lightning Network](https://github.com/lnbook/lnbook) - Andreas M. Antonopoulos, Olaoluwa Osuntokun, Rene Pickhardt (AsciiDoc)
 * [Playtime with Hyperledger Composer](https://schadokar.dev/ebooks/playtime-with-hyperledger-composer/) - Shubham Chadokar (PDF)
@@ -200,7 +200,7 @@ Books that cover a specific programming language can be found in the [BY PROGRAM
 
 ### Competitive Programming
 
-* [Competitive Programmer's Handbook](https://cses.fi/book/book.pdf) - Antti Laaksonen (PDF)
+* [Competitive Programmer's Handbook](https://cses.fi/book/book.pdf) - Antti Laaksonen (PDF) `(CC BY-NC-SA)`
 * [Competitive Programming, 1st Edition](https://cpbook.net/#CP1details) - Steven Halim [(PDF)](https://www.comp.nus.edu.sg/~stevenha/myteaching/competitive_programming/cp1.pdf)
 * [Competitive Programming, 2nd Edition](https://cpbook.net/#CP2details) - Steven Halim [(PDF)](https://www.comp.nus.edu.sg/~stevenha/myteaching/competitive_programming/cp2.pdf)
 * [Principles of Algorithmic Problem Solving](https://www.csc.kth.se/~jsannemo/slask/main.pdf) - Johan Sannemo (PDF)